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1.
Mol Hum Reprod ; 29(7)2023 06 30.
Artigo em Inglês | MEDLINE | ID: mdl-37326833

RESUMO

We have previously demonstrated spermicidal activity of LL-37 antimicrobial peptide on mouse/human sperm and its contraceptive effects in female mice. With its microbicidal action against Neisseria gonorrhoeae, LL-37 warrants development into a multipurpose prevention technology (MPT) agent for administering into the female reproductive tract (FRT). However, it is important to verify that multiple administrations of LL-37 do not lead to damage of FRT tissues and/or irreversible loss of fecundity. Herein, we transcervically injected LL-37 (36 µM-10× spermicidal dose) into female mice in estrus in three consecutive estrous cycles. A set of mice were sacrificed for histological assessment of the vagina/cervix/uterus 24 h after the last injection, while the second set were artificially inseminated with sperm from fertile males 1 week afterwards, and then monitored for pregnancy. Mice injected with PBS in parallel were regarded as negative controls, whereas those injected with vaginal contraceptive foam (VCF, available over the counter), containing 12.5% nonoxynol-9, served as positive controls for vaginal epithelium disruption. We demonstrated that the vagina/cervix/uterus remained normal in both LL-37-injected and PBS-injected mice, which also showed 100% resumption of fecundity. In contrast, VCF-injected mice showed histological abnormalities in the vagina/cervix/uterus and only 50% of them resumed fecundity. Similarly, LL-37 multiply administered intravaginally caused no damage to FRT tissues. While our results indicate the safety of multiple treatments of LL-37 in the mouse model, similar studies have to be conducted in non-human primates and then humans. Regardless, our study provides an experimental model for studying in vivo safety of other vaginal MPT/spermicide candidates.


Assuntos
Peptídeos Antimicrobianos , Espermicidas , Gravidez , Masculino , Feminino , Humanos , Camundongos , Animais , Sêmen , Espermicidas/farmacologia , Nonoxinol/farmacologia , Espermatozoides
2.
Public Health ; 219: 110-116, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37163786

RESUMO

OBJECTIVES: This study aimed to (1) provide a comprehensive overview of contraceptive methods self-reported by men in England, over 5 years, focusing on condoms in comparison to any male method; and (2) explore condom as a contraceptive method by region and ethnicity. STUDY DESIGN: Data were from the Sexual and Reproductive Health Services (Contraception) England census data set from 2014/15 to 2018/19. Once missing data were removed, this left a total of 365,292 men. Two binomial logistic regression models were performed. Model 1 examined ethnicity, region, and time on condom as a method of contraception; and Model 2 examined ethnicity, region, and time by any male contraceptive. Descriptive statistics were run for natural family planning and spermicide. RESULTS: Model 1 revealed a significant model, χ2 (15) = 30,976, P < 0.001, and predicted that condoms as a method decreased in London with a greater decrease in Midlands. London saw the lowest rate of decline among the non-White ethnic group, whereas North and South regions increased probability over time. The North started at a higher probability and the South at the lowest. Model 2 also revealed a significant model, χ2 (15) = 32,472, P < 0.001, with a similar pattern to Model 1. Contingency tables showed natural family planning and spermicide were the least reported methods and decreased over time. CONCLUSIONS: As any male contraceptive method appears to be decreasing in both models, reproductive health promotion is required. This study has implications for commissioning funds and for identifying regional areas of further investigation.


Assuntos
Preservativos , Espermicidas , Feminino , Masculino , Humanos , Anticoncepcionais , Métodos Naturais de Planejamento Familiar , Anticoncepção/métodos
3.
Hum Reprod ; 37(11): 2503-2517, 2022 10 31.
Artigo em Inglês | MEDLINE | ID: mdl-36053257

RESUMO

STUDY QUESTION: Is 17BIPHE2, an engineered cathelicidin antimicrobial peptide with low susceptibility to proteases, a better spermicide in cervicovaginal fluid (CVF) than its parental peptides, LL-37 and GF-17? SUMMARY ANSWER: At the same mass concentration, 17BIPHE2 exhibited the highest spermicidal activity on human sperm resuspended in CVF-containing medium. WHAT IS KNOWN ALREADY: LL-37 and its truncated peptide GF-17 exert both spermicidal and microbicidal activities, although they are prone to proteolytic degradation in body fluids. STUDY DESIGN, SIZE, DURATION: Spermicidal activities of 17BIPHE2 were evaluated in vitro in mouse and human sperm, both resuspended in medium, and then on human sperm incubated in CVF-containing medium; in the latter condition, the spermicidal activity and peptide stability in CVF of 17BIPHE2 were compared with that of LL-37 and GF-17. The in vivo contraceptive effects of 17BIPHE2 and the reversibility thereof were then assessed in mice. Finally, in vitro microbicidal effects of 17BIPHE2 on Neisseria gonorrhoeae were determined. PARTICIPANTS/MATERIALS, SETTING, METHODS: Sperm motility and plasma membrane integrity were assessed by videomicroscopy and exclusion of Sytox Green, a membrane-impermeable fluorescent dye, respectively. Successful in vitro fertilization (IVF) was determined by the presence of two pronuclei in oocytes following their coincubation with capacitated untreated or 17BIPHE2-treated sperm. Sperm alone or with 17BIPHE2 were transcervically injected into female mice and successful in vivo fertilization was indicated by the formation of two-cell embryos 42-h postinjection, and by pregnancy through pup delivery 21-25 days afterwards. Peptide intactness was assessed by immunoblotting and HPLC. Reversibility of the contraceptive effects of 17BIPHE2 was evaluated by resumption of pregnancy of the female mice, pretranscervically injected with 17BIPHE2, following natural mating with fertile males. Minimum inhibitory/bactericidal concentrations of 17BIPHE2 on N. gonorrhoeae were obtained through microdilution broth assay. MAIN RESULTS AND THE ROLE OF CHANCE: At the same mass concentration, 17BIPHE2 was a more effective spermicide than LL-37 or GF-17 on human sperm resuspended in CVF-containing medium, with the spermicidal concentration of 32.4 µM. This was mainly due to lower susceptibility of 17BIPHE2 to CVF proteases. Importantly, the reproductive tract of mouse females treated three times with 32.4 µM 17BIPHE2 remained normal and their fecundity resumed after stopping 17BIPHE2 treatment. LIMITATIONS, REASONS FOR CAUTION: For ethical reasons, the inhibitory effects of 17BIPHE2 on fertilization and pregnancy cannot presently be performed in women. Also, while our study has proven the effectiveness of 17BIPHE2 as a spermicide for mouse and human sperm in vitro, dosage formulation (e.g. in hydrogel) of 17BIPHE2 still needs to be developed to allow 17BIPHE2 to remain in the vagina/uterine cavity with controlled release for its spermicidal action. WIDER IMPLICATIONS OF THE FINDINGS: Since 17BIPHE2 also exerted bactericidal activity against N. gonorrhoeae at its spermicidal concentration, it is a promising candidate to be developed into a vaginal multipurpose prevention technology agent, thus empowering women against unplanned pregnancies and sexually transmitted infections. STUDY FUNDING/COMPETING INTEREST(S): This work was supported by the Canadian Institutes of Health Research (PJT 173268 to N.T.). There are no competing interests to declare. TRIAL REGISTRATION NUMBER: N/A.


Assuntos
Anti-Infecciosos , Espermicidas , Gravidez , Masculino , Feminino , Humanos , Animais , Camundongos , Neisseria gonorrhoeae , Peptídeos Antimicrobianos , Motilidade dos Espermatozoides , Peptídeo Hidrolases/farmacologia , Sêmen , Canadá , Espermicidas/farmacologia , Espermatozoides , Anti-Infecciosos/farmacologia , Anticoncepcionais , Catelicidinas
4.
Biol Reprod ; 103(2): 400-410, 2020 08 04.
Artigo em Inglês | MEDLINE | ID: mdl-32303757

RESUMO

Inhibition of the sperm transport process in the female reproductive tract could lead to infertility. We previously showed that a pan-serine protease inhibitor, 4-(2-aminoethyl)benzenesulfonyl fluoride (AEBSF), blocked semen liquefaction in vivo and resulted in a drastic decrease in the number of sperm in the oviduct of female mice. In this study, we used a mouse model to test the efficacy of AEBSF as a reversible contraceptive, a sperm motility inhibitor, and a spermicide. Additionally, this study evaluated the toxicity of AEBSF on mouse vaginal tissues in vivo and human endocervical cells in vitro. We found that female mice treated with AEBSF had significantly less pups born per litter as well as fertilization rates in vivo compared to the vehicle control. We then showed that AEBSF reduced sperm motility and fertilization capability in vitro in a dose-dependent manner. Furthermore, AEBSF also exhibited spermicidal effects. Lastly, AEBSF treatment in female mice for 10 min or 3 consecutive days did not alter vaginal cell viability in vivo, similar to that of the vehicle and non-treated controls. However, AEBSF decreased cell viability of human ectocervical (ECT) cell line in vitro, suggesting that cells in the lower reproductive tract in mice and humans responded differently to AEBSF. In summary, our study showed that AEBSF can be used as a prototype compound for the further development of novel non-hormonal contraceptives for women by targeting sperm transport in the female reproductive tract.


Assuntos
Fertilidade/efeitos dos fármacos , Fertilização/efeitos dos fármacos , Infertilidade Feminina/fisiopatologia , Inibidores de Serina Proteinase/farmacologia , Motilidade dos Espermatozoides/efeitos dos fármacos , Sulfonas/farmacologia , Animais , Linhagem Celular , Colo do Útero/efeitos dos fármacos , Feminino , Humanos , Tamanho da Ninhada de Vivíparos , Masculino , Camundongos , Espermicidas , Espermatozoides/efeitos dos fármacos , Vagina/efeitos dos fármacos
5.
J Obstet Gynaecol Can ; 41 Suppl 1: S1-S23, 2019 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-31151552

RESUMO

OBJECTIF: Fournir des lignes directrices aux fournisseurs de soins quant à l'utilisation de modes de contraception pour la prévention de la grossesse et quant à la promotion d'une sexualité saine. ISSUES: Orientation des praticiens canadiens en ce qui concerne l'efficacité globale, le mécanisme d'action, les indications, les contre-indications, les avantages n'étant pas liés à la contraception, les effets indésirables, les risques et le protocole de mise en œuvre des modes de contraception abordés; planification familiale dans le contexte de la santé sexuelle et du bien-être général; méthodes de counseling en matière de contraception; et accessibilité et disponibilité des modes de contraception abordés au Canada. RéSULTATS: La littérature publiée a été récupérée par l'intermédiaire de recherches menées dans MEDLINE et The Cochrane Library entre janvier 1994 et janvier 2015 au moyen d'un vocabulaire contrôlé (p. ex. contraception, sexuality, sexual health) et de mots clés (p. ex. contraception, family planning, hormonal contraception, emergency contraception) appropriés. Les résultats ont été restreints aux analyses systématiques, aux études observationnelles et aux essais comparatifs randomisés / essais cliniques comparatifs publiés en anglais entre janvier 1994 et janvier 2015. Les recherches ont été mises à jour de façon régulière et intégrées à la directive clinique jusqu'en juin 2015. La littérature grise (non publiée) a été identifiée par l'intermédiaire de recherches menées dans les sites Web d'organismes s'intéressant à l'évaluation des technologies dans le domaine de la santé et d'organismes connexes, dans des collections de directives cliniques, dans des registres d'essais cliniques et auprès de sociétés de spécialité médicale nationales et internationales. VALEURS: La qualité des résultats a été évaluée au moyen des critères décrits dans le rapport du Groupe d'étude canadien sur les soins de santé préventifs (Tableau 1). CHAPITRE 7 : CONTRACEPTION INTRA-UTéRINE: Déclarations sommaires RECOMMANDATIONS.

6.
Indian J Microbiol ; 59(1): 51-57, 2019 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-30728630

RESUMO

Staphylococcus warneri, isolated from the cervix of an adult female with unexplained infertility, was found to agglutinate human spermatozoa in vitro leading to their death. A genomic library of S. warneri was generated using pSMART-Escherichia coli vector-host system. Approximately 3500 transformants were screened and four showed sperm agglutinating activity. Sperm agglutinating proteins (SAPs) were partially purified from the positive transformants and were found to agglutinate sperms in vitro. Cloned ORFs in positive transformants were sequenced and ORF finder identified them as endonuclease, accessory secretory protein-Asp1, accessory secretory protein-Asp2 and signal transduction protein. Mannose was found to competitively inhibit sperm agglutination, indicating that SAPs in S. warneri bind to mannose in glycoprotein receptors on the surface of sperms for agglutination. This is the first report on identification of SAPs which may be responsible for unexplained infertility in women and may be used as contraceptive agents.

7.
J Cell Physiol ; 233(2): 1041-1050, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-28409819

RESUMO

Presently available contraceptives are mostly hormonal or detergent in nature with numerous side effects like irritation, lesion, inflammation in vagina, alteration of body homeostasis, etc. Antimicrobial peptides with spermicidal activity but without adverse effects may be suitable alternatives. In the present study, spermicidal activity of a cationic antimicrobial peptide VRP on human spermatozoa has been elucidated. Progressive forward motility of human spermatozoa was instantly stopped after 100 µM VRP treatment and at 350 µM, all kinds of sperm motility ceased within 20 s as assessed by the Sander-Cramer assay. The spermicidal effect was confirmed by eosin-nigrosin assay and HOS test. VRP treatment (100 µM) in human spermatozoa induced both the intrinsic and extrinsic pathways of apoptosis. TUNEL assay showed VRP treatment significantly disrupted the DNA integrity and changed the mitochondrial membrane permeability as evident from MPTP assay. AFM and SEM results depicted ultra structural changes including disruption of the acrosomal cap and plasma membrane of the head and midpiece region after treatment with 350 µM VRP. MTT assay showed after treatments with 100 and 350 µM of VRP for 24 hr, a substantial amount of Lactobacillus acidophilus (about 90% and 75%, respectively) remained viable. Hence, VRP being a small synthetic peptide with antimicrobial and spermicidal activity but tolerable to normal vaginal microflora, may be a suitable target for elucidating its contraceptive potentiality.


Assuntos
Peptídeos Catiônicos Antimicrobianos/farmacologia , Apoptose/efeitos dos fármacos , Membrana Celular/efeitos dos fármacos , Peptídeos/farmacologia , Espermicidas/farmacologia , Espermatozoides/efeitos dos fármacos , Acrossomo/efeitos dos fármacos , Acrossomo/metabolismo , Acrossomo/ultraestrutura , Membrana Celular/metabolismo , Membrana Celular/ultraestrutura , Relação Dose-Resposta a Droga , Humanos , Lactobacillus/efeitos dos fármacos , Masculino , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Viabilidade Microbiana/efeitos dos fármacos , Proteínas de Transporte da Membrana Mitocondrial/efeitos dos fármacos , Proteínas de Transporte da Membrana Mitocondrial/metabolismo , Membranas Mitocondriais/efeitos dos fármacos , Membranas Mitocondriais/metabolismo , Membranas Mitocondriais/ultraestrutura , Poro de Transição de Permeabilidade Mitocondrial , Permeabilidade , Peça Intermédia do Espermatozoide/efeitos dos fármacos , Peça Intermédia do Espermatozoide/metabolismo , Peça Intermédia do Espermatozoide/ultraestrutura , Motilidade dos Espermatozoides/efeitos dos fármacos , Espermatozoides/metabolismo , Espermatozoides/ultraestrutura , Fatores de Tempo
8.
Andrologia ; 50(10): e13129, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30125378

RESUMO

This study evaluated the antifertility activity of methanolic extract of Chenopodium ambrosioides leaf on male rats. During the experiment, different doses of extract (0, 50, 100 and 150 mg/kg) were orally administered to rats for 28 days. Analysis of sperm parameters revealed a dose-dependent decrease in sperm motility, viability and daily sperm production (DSP). While, increased oxidative stress in reproductive organs; and impaired testicular and epididymal histology was also evident in high dose regimen. Furthermore, a reduction in concentrations of plasma testosterone, follicle stimulating hormone (FSH) and luteinizing hormone (LH) was also recorded. Reduced pregnancy outcome and small litter size in the females paired with treated male rats after 30 days of treatment withdrawn was noted in higher doses. From these findings, it is concluded that the methanolic leaf extract of C. ambrosioides is quite effective in reversible suppression of male fertility.


Assuntos
Chenopodium ambrosioides/química , Anticoncepcionais/farmacologia , Fertilidade/efeitos dos fármacos , Extratos Vegetais/farmacologia , Testículo/efeitos dos fármacos , Administração Oral , Animais , Relação Dose-Resposta a Droga , Feminino , Masculino , Metanol/química , Modelos Animais , Estresse Oxidativo/efeitos dos fármacos , Folhas de Planta/química , Controle da População/métodos , Gravidez , Ratos , Ratos Sprague-Dawley , Contagem de Espermatozoides , Motilidade dos Espermatozoides/efeitos dos fármacos , Espermatogênese/efeitos dos fármacos , Testículo/metabolismo
9.
Eur J Contracept Reprod Health Care ; 23(2): 147-153, 2018 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-29671339

RESUMO

OBJECTIVE: The aim of our study was to evaluate the effects of ozonised olive oil (OOO) on human sperm in vitro. METHODS: Human sperm was incubated with OOO for 20 s in vitro. The lowest concentration that completely immobilised all the sperm in 20 s without subsequent recovery of motility was recorded as the minimum effective concentration (MEC). The effects of OOO at MEC on human sperm viability, mitochondrial and acrosomal status, DNA integrity and transmission electron microscopy were observed. RESULTS: Our findings demonstrate that OOO dose-dependently inhibits sperm motility. The MEC of OOO for 100% sperm immobilisation in 20 s was 6 µg/ml. Further experiments showed that sperm ultrastructure, function and DNA integrity were significantly affected after treatment with 6 µg/ml OOO in vitro. CONCLUSIONS: OOO has spermicidal potential and may be explored as a promising vaginal contraceptive agent.


Assuntos
Antiespermatogênicos/farmacologia , Azeite de Oliva/farmacologia , Oxidantes Fotoquímicos/farmacologia , Ozônio/farmacologia , Espermatozoides/efeitos dos fármacos , Humanos , Masculino , Motilidade dos Espermatozoides/efeitos dos fármacos
10.
Proc Natl Acad Sci U S A ; 111(11): 4145-50, 2014 Mar 18.
Artigo em Inglês | MEDLINE | ID: mdl-24591616

RESUMO

In mammals, sperm migrate through the female reproductive tract to reach the egg; however, our understanding of this journey is highly limited. To shed light on this process, we focused on defining the functions of seminal vesicle secretion 2 (SVS2). SVS2(-/-) male mice produced sperm but were severely subfertile, and formation of a copulatory plug to cover the female genital opening did not occur. Surprisingly, even when artificial insemination was performed with silicon as a substitute for the plug, sperm fertility in the absence of SVS2 remained severely reduced because the sperm were already dead in the uterus. Thus, our results provide evidence that the uterus induces sperm cell death and that SVS2 protects sperm from uterine attack.


Assuntos
Proteínas Secretadas pela Vesícula Seminal/metabolismo , Glândulas Seminais/metabolismo , Espermatozoides/fisiologia , Útero/química , Reação Acrossômica/fisiologia , Animais , Southern Blotting , Movimento Celular/fisiologia , Feminino , Fertilidade/fisiologia , Proteínas de Fluorescência Verde/metabolismo , Immunoblotting , Masculino , Camundongos , Camundongos Knockout , Microscopia Eletrônica , Reação em Cadeia da Polimerase , Corantes de Rosanilina , Proteínas Secretadas pela Vesícula Seminal/genética , Espermatozoides/ultraestrutura , Estatísticas não Paramétricas
11.
Am J Obstet Gynecol ; 214(2): 264.e1-264.e7, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26525365

RESUMO

BACKGROUND: Easily accessible contraceptive methods, such as chemical and barrier methods, are used currently by approximately 1 in 6 women who use contraception in the United States. Even in the face of suboptimal effectiveness, coitally dependent methods likely will always have a role in fertility management. Because most contraceptive efficacy stratifications use population-based data, for women to make informed decisions about the individual fit of a contraceptive method, better evidence-based, user-friendly tools are needed. OBJECTIVES: Spermicides are a readily available, over-the counter, woman-controlled contraceptive method, but their effectiveness is user-dependent. Patient-decision aids for spermicides and other barrier methods are not well-developed, and overall failure rates could be improved by aids that account for individual characteristics. We sought to derive a prediction rule for successful use of spermicides for pregnancy prevention and to convert those data to a point-of-care instrument that women can use when they are considering spermicide use during contraceptive decision-making. STUDY DESIGN: We pooled local data from 3 randomized clinical trials that were published in 2004, 2007, and 2010 that tested spermicide efficacy. We constructed a prediction rule for unintended pregnancy using bootstrap validation and developed a scoring system. RESULTS: Data from 621 women showed a mean age of 29 years; 49% of the women were African American, and 43% were white. The overall pregnancy rate was 10.3% (95% confidence interval, 7.9-12.7) over 6 months. In adjusted logistic regression, age >35 years was protective against pregnancy (odds ratio, 0.19; 95% confidence interval, 0.06-0.58; P = .003), and multigravidity was associated with high failure rates (odds ratio, 7.24; 95% confidence interval, 3.04-17.3; P < .001). These risk factors (together with frequency of unprotected sex) were used in a model that maximized sensitivity for pregnancy prediction to compute the predicted probability of unintended pregnancy for each woman. This model was 97% accurate in predicting women who had a <5% pregnancy risk while using spermicides. CONCLUSION: Using prospectively collected data, we built a simple risk calculator for contraceptive failure that women can consult when considering spermicide use. This instrument could support patient-centered contraceptive decision-making.


Assuntos
Técnicas de Apoio para a Decisão , Assistência Centrada no Paciente , Taxa de Gravidez , Espermicidas/uso terapêutico , Adulto , Negro ou Afro-Americano , Fatores Etários , Feminino , Humanos , Modelos Logísticos , Razão de Chances , Sistemas Automatizados de Assistência Junto ao Leito , Gravidez , Estudos Prospectivos , Medição de Risco , Resultado do Tratamento , População Branca , Adulto Jovem
12.
J Obstet Gynaecol Can ; 38(2): 182-222, 2016 Feb.
Artigo em Inglês, Francês | MEDLINE | ID: mdl-27032746

RESUMO

OBJECTIVE: To provide guidelines for health care providers on the use of contraceptive methods to prevent pregnancy and on the promotion of healthy sexuality. OUTCOMES: Overall efficacy of cited contraceptive methods, assessing reduction in pregnancy rate, safety, ease of use, and side effects; the effect of cited contraceptive methods on sexual health and general well-being; and the relative cost and availability of cited contraceptive methods in Canada. EVIDENCE: Published literature was retrieved through searches of Medline and The Cochrane Database from January 1994 to January 2015 using appropriate controlled vocabulary (e.g., contraception, sexuality, sexual health) and key words (e.g., contraception, family planning, hormonal contraception, emergency contraception). Results were restricted to systematic reviews, randomized control trials/controlled clinical trials, and observational studies published in English from January 1994 to January 2015. Searches were updated on a regular basis in incorporated in the guideline to June 2015. Grey (unpublished) literature was identified through searching the websites of health technology assessment and health technology-related agencies, clinical practice guideline collections, clinical trial registries, and national and international medical specialty societies. VALUES: The quality of the evidence in this document was rated using the criteria described in the Report of the Canadian Task Force on Preventive Health Care (Table 1). CHAPTER 7: INTRAUTERINE CONTRACEPTION: SUMMARY STATEMENTS: 1. Intrauterine contraceptives are as effective as permanent contraception methods. (II-2) 2. The use of levonorgestrel-releasing intrauterine system (LNG-IUS) 52 mg by patients taking tamoxifen is not associated with recurrence of breast cancer. (I) 3. Intrauterine contraceptives have a number of noncontraceptive benefits. The levonorgestrel-releasing intrauterine system (LNG-IUS) 52 mg significantly decreases menstrual blood loss (I) and dysmenorrhea. (II-2) Both the copper intrauterine device and the LNG-IUS significantly decrease the risk of endometrial cancer. (II-2) 4. The risk of uterine perforation decreases with inserter experience but is higher in postpartum and breastfeeding women. (II-2) 5. The risk of pelvic inflammatory disease (PID) is increased slightly in the first month after intrauterine contraceptive (IUC) insertion, but the absolute risk is low. Exposure to sexually transmitted infections and not the IUC itself is responsible for PID occurring after the first month of use. (II-2) 6. Nulliparity is not associated with an increased risk of intrauterine contraceptive expulsion. (II-2) 7. Ectopic pregnancy with an intrauterine contraceptive (IUC) is rare, but when a pregnancy occurs with an IUC in situ, it is an ectopic pregnancy in 15% to 50% of the cases. (II-2) 8. In women who conceive with an intrauterine contraceptive (IUC) in place, early IUC removal improves outcomes but does not entirely eliminate risks. (II-2) 9. Intrauterine contraceptives do not increase the risk of infertility. (II-2) 10. Immediate insertion of an intrauterine contraceptive (10 minutes postplacental to 48 hours) postpartum or post-Caesarean section is associated with a higher continuation rate compared with insertion at 6 weeks postpartum. (I) 11. Immediate insertion of an intrauterine contraceptive (IUC; 10 minutes postplacental to 48 hours) postpartum or post-Caesarean section is associated with a higher risk of expulsion. (I) The benefit of inserting an IUC immediately postpartum or post-Caesarean section outweighs the disadvantages of increased risk of perforation and expulsion. (II-C) 12. Insertion of an intrauterine contraceptive in breastfeeding women is associated with a higher risk of uterine perforation in the first postpartum year. (II-2) 13. Immediate insertion of an intrauterine contraceptive (IUC) post-abortion significantly reduces the risk of repeat abortion (II-2) and increases IUC continuation rates at 6 months. (I) 14. Antibiotic prophylaxis for intrauterine contraceptive insertion does not significantly reduce postinsertion pelvic infection. (I) RECOMMENDATIONS: 1. Health care professionals should be careful not to restrict access to intrauterine contraceptives (IUC) owing to theoretical or unproven risks. (III-A) Health care professionals should offer IUCs as a first-line method of contraception to both nulliparous and multiparous women. (II-2A) 2. In women seeking intrauterine contraception (IUC) and presenting with heavy menstrual bleeding and/or dysmenorrhea, health care professionals should consider the use of the levonorgestrel intrauterine system 52 mg over other IUCs. (I-A) 3. Patients with breast cancer taking tamoxifen may consider a levonorgestrel-releasing intrauterine system 52 mg after consultation with their oncologist. (I-A) 4. Women requesting a levonorgestrel-releasing intrauterine system or a copper-intrauterine device should be counseled regarding changes in bleeding patterns, sexually transmitted infection risk, and duration of use. (III-A) 5. A health care professional should be reasonably certain that the woman is not pregnant prior to inserting an intrauterine contraceptive at any time during the menstrual cycle. (III-A) 6. Health care providers should consider inserting an intrauterine contraceptive immediately after an induced abortion rather than waiting for an interval insertion. (I-B) 7. In women who conceive with an intrauterine contraceptive (IUC) in place, the diagnosis of ectopic pregnancy should be excluded as arly as possible. (II-2A) Once an ectopic pregnancy has been excluded, the IUC should be removed without an invasive procedure. The IUC may be removed at the time of a surgical termination. (II-2B) 8. In the case of pelvic inflammatory disease, it is not necessary to remove the intrauterine contraceptive unless there is no clinical improvement after 48 to 72 hours of appropriate antibiotic treatment. (II-2B) 9. Routine antibiotic prophylaxis for intrauterine contraceptive (IUC) insertion is not indicated. (I-B) Health care providers should perform sexually transmitted infection (STI) testing in women at high risk of STI at the time of IUC insertion. If the test is positive for chlamydia and/or gonorrhea, the woman should be appropriately treated postinsertion and the IUC can remain in situ. (II-2B) 10. Unscheduled bleeding in intrauterine contraception users, when persistent or associated with pelvic pain, should be investigated to rule out infection, pregnancy, gynecological pathology, expulsion or malposition. (III-A)


Assuntos
Preservativos Femininos , Consenso , Anticoncepcionais Orais Hormonais , Dispositivos Intrauterinos , Canadá , Feminino , Humanos , Gravidez , Saúde Reprodutiva
13.
J Obstet Gynaecol Can ; 37(10): 936-42, 2015 Oct.
Artigo em Inglês, Francês | MEDLINE | ID: mdl-26606712

RESUMO

OBJECTIVE: To provide guidelines for health care providers on the use of contraceptive methods to prevent pregnancy and on the promotion of healthy sexuality. OUTCOMES: Guidance for Canadian practitioners on overall effectiveness, mechanism of action, indications, contraindications, non-contraceptive benefits, side effects and risks, and initiation of cited contraceptive methods; family planning in the context of sexual health and general well-being; contraceptive counselling methods; and access to, and availability of, cited contraceptive methods in Canada. EVIDENCE: Published literature was retrieved through searches of Medline and The Cochrane Database from January 1994 to January 2015 using appropriate controlled vocabulary (e.g., contraception, sexuality, sexual health) and key words (e.g., contraception, family planning, hormonal contraception, emergency contraception). Results were restricted to systematic reviews, randomized control trials/controlled clinical trials, and observational studies published in English from January 1994 to January 2015. Searches were updated on a regular basis and incorporated in the guideline to June 2015. Grey (unpublished) literature was identified through searching the websites of health technology assessment and health technology-related agencies, clinical practice guideline collections, clinical trial registries, and national and international medical specialty societies. VALUES: The quality of the evidence in this document was rated using the criteria described in the Report of the Canadian Task Force on Preventive Health Care (Table). Chapter 1: Contraception in Canada Summary Statements 1. Canadian women spend a significant portion of their lives at risk of an unintended pregnancy. (II-2) 2. Effective contraceptive methods are underutilized in Canada, particularly among vulnerable populations. (II-2) 3. Long-acting reversible contraceptive methods, including contraceptive implants and intrauterine contraception (copper-releasing and levonorgestrel-releasing devices/systems), are the most effective reversible contraceptive methods and have the highest continuation rates. (II-1) 4. Canada currently does not collect reliable data to determine the use of contraceptive methods, abortion rates, and the prevalence of unintended pregnancy among reproductive-age women. (II-2) 5. A universal subsidy for contraceptive methods as provided by many of Canada's peer nations and a few Canadian provinces may produce health system cost-savings. (II-2) 6. Health Canada approval processes for contraceptives have been less efficient than those of other drug approval agencies and Health Canada processes for other classes of pharmaceuticals. (II-2) 7. It is feasible and safe for contraceptives and family planning services to be provided by appropriately trained allied health professionals such as midwives, registered nurses, nurse practitioners, and pharmacists. (II-2) Recommendations 1. Contraceptive counselling should include a discussion of typical use failure rates and the importance of using the contraceptive method consistently and correctly in order to avoid pregnancy. (II-2A) 2. Women seeking contraception should be counselled on the wide range of effective methods of contraception available, including long-acting reversible contraceptive methods (LARCs). LARCs are the most effective methods of reversible contraception, have high continuation rates, and should be considered when presenting contraceptive options to any woman of reproductive age. (II-2A) 3. Family planning counselling should include counselling on the decline of fertility associated with increasing female age. (III-A) 4. Health policy supporting a universal contraception subsidy and strategies to promote the uptake of highly effective methods as cost-saving measures that improve health and health equity should be considered by Canadian health decision makers. (III-B) 5. Canadian health jurisdictions should consider expanding the scope of practice of other trained professionals such as nurses, nurse practitioners, midwives, and pharmacists and promoting task-sharing in family planning. (II-2B) 6. The Canadian Community Health Survey should include adequate reproductive health indicators in order for health care providers and policy makers to make appropriate decisions regarding reproductive health policies and services in Canada. (III-B) 7. Health Canada processes and policies should be reviewed to ensure a wide range of modern contraceptive methods are available to Canadian women. (III-B) Chapter 2: Contraceptive Care and Access Summary Statements 8. Although there are many contraceptive options in Canada, only a narrow range of contraceptive methods are commonly used by those of reproductive age. (II-3) 9. Condom use decreases with longer relationship tenure and when the sexual partner is considered to be the main partner, likely due to a lower perceived risk of sexually transmitted infection in that relationship. Condom use may also decrease markedly as an unintended consequence when an effective non-barrier method, such as hormonal contraception or intrauterine contraception, is initiated. (II-3) 10. Family planning counselling provides a natural segue into screening for concerns about sexual function or intimate partner violence. (III) 11. Well-informed and well-motivated individuals who have developed skills to practise safer sex behaviours are more likely to use contraceptive and safer sex methods effectively and consistently. (II-2) Recommendations 8. Comprehensive family planning services, including abortion services, should be accessible to all Canadians regardless of geographic location. These services should be confidential, non-judgemental, and respectful of individuals' privacy and cultural contexts. (III-A) 9. A contraceptive visit should include history taking, screening for contraindications, dispensing or prescribing a method of contraception, and exploring contraceptive choice and adherence in the broader context of the individual's sexual behaviour, reproductive health risk, social circumstances, and relevant belief systems. (III-B) 10. Health care providers should provide practical information on the wide range of contraceptive options and their potential non-contraceptive benefits and assist women and their partners in determining the best user-method fit. (III-B) 11. Health care providers should assist women and men in developing the skills necessary to negotiate the use of contraception and the correct and consistent use of a chosen method. (III-B) 12. Contraceptive care should include discussion and management of the risk of sexually transmitted infection, including appropriate recommendations for condom use and dual protection, STI screening, post-exposure prophylaxis, and Hepatitis B and human papillomavirus vaccination. (III-B) 13. Health care providers should emphasize the use of condoms not only for protection against sexually transmitted infection, but also as a back-up method when adherence to a hormonal contraceptive may be suboptimal. (I-A) 14. Health care providers should be aware of current media controversies in reproductive health and acquire relevant evidence-based information that can be briefly and directly communicated to their patients. (III-B) 15. Referral resources for intimate partner violence, sexually transmitted infections, sexual dysfunction, induced abortion services, and child protection services should be available to help clinicians provide contraceptive care in the broader context of women's health. (III-B) Chapter 3: Emergency Contraception Summary Statements 12. The copper intrauterine device is the most effective method of emergency contraception. (II-2) 13. A copper intrauterine device can be used for emergency contraception up to 7 days after unprotected intercourse provided that pregnancy has been ruled out and there are no other contraindications to its insertion. (II-2) 14. Levonorgestrel emergency contraception is effective up to 5 days (120 hours) after intercourse; its effectiveness decreases as the time between unprotected intercourse and ingestion increases. (II-2) 15. Ulipristal acetate for emergency contraception is more effective than levonorgestrel emergency contraception up to 5 days after unprotected intercourse. This difference in effectiveness is more pronounced as the time from unprotected intercourse increases, especially after 72 hours. (I) 16. Hormonal emergency contraception (levonorgestrel emergency contraception and ulipristal acetate for emergency contraception) is not effective if taken on the day of ovulation or after ovulation. (II-2) 17. Levonorgestrel emergency contraception may be less effective in women with a body mass index > 25 kg/m2 and ulipristal acetate for emergency contraception may be less effective in women with a body mass index > 35 kg/m2. However, hormonal emergency contraception may still retain some effectiveness regardless of a woman's body weight or body mass index. (II-2) 18. Hormonal emergency contraception is associated with higher failure rates when women continue to have subsequent unprotected intercourse. (II-2) 19. Hormonal contraception can be initiated the day of or the day following the use of levonorgestrel emergency contraception, with back-up contraception used for the first 7 days. (III) 20. Hormonal contraception can be initiated 5 days following the use of ulipristal acetate for emergency contraception, with back-up contraception used for the first 14 days. (III) Recommendations 16. All emergency contraception should be initiated as soon as possible after unprotected intercourse. (II-2A) 17. Women should be informed that the copper intrauterine device (IUD) is the most effective method of emergency contraception and can be used by any woman with no contraindications to IUD use. (II-3A) 18.


Objectif : Fournir des lignes directrices aux fournisseurs de soins quant à l'utilisation de modes de contraception pour la prévention de la grossesse et quant à la promotion d'une sexualité saine. Issues : Orientation des praticiens canadiens en ce qui concerne l'efficacité globale, le mécanisme d'action, les indications, les contre-indications, les avantages n'étant pas liés à la contraception, les effets indésirables, les risques et le protocole de mise en œuvre des modes de contraception abordés; planification familiale dans le contexte de la santé sexuelle et du bien-être général; méthodes de counseling en matière de contraception; et accessibilité et disponibilité des modes de contraception abordés au Canada. Résultats : La littérature publiée a été récupérée par l'intermédiaire de recherches menées dans MEDLINE et The Cochrane Library entre janvier 1994 et janvier 2015 au moyen d'un vocabulaire contrôlé (p. ex. contraception, sexuality, sexual health) et de mots clés (p. ex. contraception, family planning, hormonal contraception, emergency contraception) appropriés. Les résultats ont été restreints aux analyses systématiques, aux études observationnelles et aux essais comparatifs randomisés / essais cliniques comparatifs publiés en anglais entre janvier 1994 et janvier 2015. Les recherches ont été mises à jour de façon régulière et intégrées à la directive clinique jusqu'en juin 2015. La littérature grise (non publiée) a été identifiée par l'intermédiaire de recherches menées dans les sites Web d'organismes s'intéressant à l'évaluation des technologies dans le domaine de la santé et d'organismes connexes, dans des collections de directives cliniques, dans des registres d'essais cliniques et auprès de sociétés de spécialité médicale nationales et internationales. Valeurs : La qualité des résultats a été évaluée au moyen des critères décrits dans le rapport du Groupe d'étude canadien sur les soins de santé préventifs (Tableau). Chapitre 1 : Contraception au Canada Déclarations sommaires 1. Les Canadiennes sont exposées à des risques de grossesse non planifiée pendant une partie considérable de leur vie. (II-2) 2. Les modes efficaces de contraception sont sous-utilisés au Canada, particulièrement au sein des populations vulnérables. (II-2) 3. Les modes de contraception réversible à action prolongée, dont les implants contraceptifs et la contraception intra-utérine (dispositifs / systèmes à libération de cuivre ou de lévonorgestrel), sont les modes de contraception réversible les plus efficaces; de plus, ils comptent les taux les plus élevés de poursuite du traitement. (II-1) 4. Au Canada à l'heure actuelle, nous ne recueillons pas de données fiables qui permettraient d'établir le taux d'utilisation des modes de contraception, le taux d'avortement et la prévalence des grossesses non planifiées chez les femmes en âge de procréer. (II-2) 5. L'octroi d'une subvention universelle destinée aux modes de contraception, à l'instar de bon nombre d'autres pays et de quelques provinces canadiennes, pourrait générer des économies pour le système de santé. (II-2) 6. Dans le cas des contraceptifs, les processus d'homologation de Santé Canada ont été moins efficaces que ceux d'autres organismes d'homologation, en plus d'être moins efficaces que les processus qu'elle a elle-même mis en vigueur en ce qui concerne d'autres catégories de produits pharmaceutiques. (II-2) 7. L'offre de contraceptifs et de services de planification familiale par des professionnels paramédicaux (tels que les sages-femmes, les infirmières autorisées, les infirmières praticiennes et les pharmaciens) ayant bénéficié d'une formation adéquate est faisable et sûre. (II-2) Recommandations 1. Les services de counseling traitant de la contraception devraient comprendre une discussion au sujet des taux d'échec liés à l'utilisation typique et de l'importance d'utiliser régulièrement et correctement le mode de contraception choisi, de façon à éviter la grossesse. (II-2A) 2. Les services de counseling offerts aux femmes qui cherchent à se prévaloir d'un mode de contraception devraient porter sur la vaste gamme des modes efficaces disponibles, y compris sur les modes de contraception réversible à action prolongée. Ces derniers sont les modes les plus efficaces de contraception réversible, comptent des taux élevés de poursuite du traitement et devraient être pris en considération, pour toutes les femmes en âge de procréer, au moment d'aborder avec celles-ci les options de contraception qui s'offrent à elles. (II-2A) 3. Les services de counseling en matière de planification familiale devraient aborder la question du déclin de la fertilité qui est associé au vieillissement chez la femme. (III-A) 4. Les décideurs canadiens du domaine de la santé devraient envisager la mise en œuvre de politiques de santé soutenant l'offre universelle d'une subvention à la contraception et de stratégies visant à promouvoir l'adoption de modes de contraception grandement efficaces, et ce, à titre de mesures de réduction des coûts permettant l'amélioration de la santé et de l'équité en matière de santé. (III-B) 5. Les territoires de compétence canadiens en matière de santé devraient envisager d'élargir le champ de pratique d'autres professionnels formés (comme les infirmières, les infirmières praticiennes, les sages-femmes et les pharmaciens) et de promouvoir le partage des tâches en planification familiale. (II-2B) 6. L'Enquête sur la santé dans les collectivités canadiennes devrait englober des indicateurs adéquats en matière de santé génésique, de façon à pouvoir permettre aux fournisseurs de soins de santé et aux décideurs de prendre des décisions opportunes à l'égard des politiques et des services de santé génésique au Canada. (III-B) 7. Les processus et les politiques de Santé Canada devraient être passés en revue pour que l'on puisse s'assurer qu'ils ne nuisent pas indûment à l'offre d'une vaste gamme de modes de contraception modernes aux Canadiennes. (III-B) Chapitre 2 : Soins en matière de contraception et accès à la contraception Déclarations sommaires 8. Bien que le Canada compte de nombreuses options en matière de contraception, les modes de contraception couramment utilisés par les femmes en âge de procréer sont issus d'une gamme restreinte. (II-3) 9. L'utilisation du condom diminue au fur et à mesure que se poursuit une relation et lorsque le partenaire sexuel est considéré comme étant le partenaire principal, probablement en raison d'une baisse du risque perçu d'infections transmissibles sexuellement au sein de la relation en question. L'utilisation du condom pourrait, de façon fortuite, également connaître une baisse marquée à la suite de la mise en œuvre d'un mode de contraception efficace ne faisant pas partie des méthodes de barrière (comme la contraception hormonale ou intra-utérine). (II-3) 10. Le counseling en matière de planification familiale peut naturellement mener au dépistage de la violence conjugale et des problèmes liés à la fonction sexuelle. (III) 11. Les personnes bien renseignées et bien motivées qui ont acquis les compétences nécessaires à la pratique de comportements sexuels à risques réduits sont plus susceptibles d'utiliser des modes de contraception et des pratiques sexuelles à risques réduits de façon efficace et systématique. (II-2) Recommandations 8. Des services exhaustifs de planification familiale (y compris des services d'avortement) devraient être offerts à tous les Canadiens, peu importe leur emplacement géographique. Ces services devraient être confidentiels et assurer le respect de la vie privée et des contextes culturels des personnes qui les utilisent. (III-A) 9. Les consultations en matière de contraception devraient comprendre une anamnèse, un dépistage des contre-indications, l'offre ou la prescription d'un mode de contraception, ainsi que l'exploration des choix en matière de contraception et des facteurs associés à l'observance dans le cadre élargi du comportement sexuel, des risques liés à la santé génésique, du contexte social et des croyances de la femme en question. (III-B) 10. Les fournisseurs de soins devraient offrir des renseignements pratiques sur la vaste gamme des options en matière de contraception et sur leurs avantages potentiels n'étant pas liés à la contraception, en plus d'aider les femmes et leurs partenaires à choisir le mode de contraception étant le mieux adapté à leurs besoins. (III-B) 11. Les fournisseurs de soins devraient aider les femmes et les hommes à acquérir les compétences nécessaires à la négociation du recours à la contraception, ainsi qu'à l'utilisation correcte et systématique du moyen de contraception choisi. (III-B) 12. Les soins en matière de contraception devraient aborder les risques de contracter des infections transmissibles sexuellement et en assurer la prise en charge; ils devraient, à ce chapitre, être fondés sur la formulation de recommandations appropriées en ce qui concerne l'utilisation de condoms et d'une protection double, le dépistage des infections transmissibles sexuellement, la prophylaxie post-exposition et la vaccination contre l'hépatite B et le virus du papillome humain. (III-B) 13. Les fournisseurs de soins devraient souligner que l'utilisation de condoms n'a pas seulement pour but de conférer une protection contre les infections transmissibles sexuellement, mais qu'elle agit également à titre de méthode d'appoint lorsque l'observance envers un contraceptif hormonal pourrait être sous-optimale. (I-A) 14. Les fournisseurs de soins devraient se tenir au fait des controverses médiatiques qui font rage dans le domaine de la santé génésique et obtenir les données factuelles pertinentes qui pourront être communiquées (de façon brève et directe) à leurs patientes. (III-B) 15. Des ressources spécialisées en ce qui concerne la violence conjugale, les infections transmissibles sexuellement, le dysfonctionnement sexuel, lesservices d'avortement provoqué et les services de protection de l'enfance devraient être disponibles pour aider les cliniciens à offrir des soins en matière de contraception dans le contexte élargi de la santé des femmes. (III-B) Chapitre 3 : Contraception d'urgence Déclarations sommaires 12. Le dispositif intra-utérin au cuivre constitue la méthode de contraception d'urgence la plus efficace. (II-2) 13. Un dispositif intra-utérin au cuivre peut être utilisé à des fins de contraception d'urgence jusqu'à sept jours à la suite d'une relation sexuelle non protégée, pour autant que la présence d'une grossesse ait été écartée et qu'il n'existe aucune autre contre-indication à son insertion. (II-2) 14. La contraception d'urgence au lévonorgestrel est efficace jusqu'à cinq jours (120 heures) à la suite d'une relation sexuelle non protégée; son efficacité diminue au fur et à mesure que s'allonge le délai entre la relation sexuelle non protégée et son administration. (II-2) 15. La contraception d'urgence à l'acétate d'ulipristal est plus efficace que celle qui fait appel au lévonorgestrel, et ce, jusqu'à cinq jours à la suite d'une relation sexuelle non protégée. Cette différence en matière d'efficacité devient plus prononcée au fur et à mesure que s'allonge le délai entre la relation sexuelle non protégée et l'administration, particulièrement après 72 heures. (I) 16. La contraception d'urgence hormonale (au lévonorgestrel ou à l'acétate d'ulipristal) n'est pas efficace lorsqu'elle est administrée le jour de l'ovulation ou par la suite. (II-2) 17. La contraception d'urgence au lévonorgestrel pourrait être moins efficace chez les femmes dont l'indice de masse corporelle est supérieur à 25 kg/m2, tandis que la contraception d'urgence à l'acétate d'ulipristal pourrait être moins efficace chez les femmes dont l'indice de masse corporelle est de 35 kg/m2 ou plus. Quoi qu'il en soit, la contraception d'urgence hormonale pourrait tout de même conserver une certaine efficacité, peu importe le poids ou l'indice de masse corporelle de la femme qui en fait la demande. (II-2) 18. La contraception d'urgence hormonale est associée à des taux d'échec plus élevés lorsque les femmes qui l'utilisent continuent par la suite à connaître des relations sexuelles non protégées. (II-2) 19. Une contraception hormonale peut être entamée le jour de l'utilisation d'une contraception d'urgence au lévonorgestrel, ou le jour suivant celle-ci, en s'assurant de mettre en œuvre une contraception d'appoint pendant les sept premiers jours. (III) 20. Une contraception hormonale peut être entamée cinq jours à la suite de l'utilisation d'une contraception d'urgence à l'acétate d'ulipristal, en s'assurant de mettre en œuvre une contraception d'appoint pendant les quatorze premiers jours. (III) Recommandations 16. La contraception d'urgence, toutes méthodes confondues, devrait être mise en œuvre dès que possible à la suite d'une relation sexuelle non protégée. (II-2A) 17. Les femmes devraient être avisées que le dispositif intra-utérin au cuivre constitue la méthode de contraception d'urgence la plus efficace et que ce dispositif peut être utilisé par toute femme qui ne présente pas de contre-indications à son utilisation. (II-3A) 18. Les fournisseurs de soins ne devraient pas déconseiller l'utilisation de la contraception d'urgence hormonale en fonction de l'indice de masse corporelle de la femme qui en fait la demande. L'utilisation d'un dispositif intra-utérin au cuivre à des fins de contraception d'urgence devrait être recommandée pour les femmes présentant un indice de masse corporelle supérieur à 30 kg/m2 qui sollicitent une contraception d'urgence. En présence de conditions favorables en matière d'accessibilité et de coût, la contraception d'urgence faisant appel à l'acétate d'ulipristal devrait constituer l'option de première intention à offrir aux femmes présentant un indice de masse corporelle de 25 kg/m2 ou plus qui préfèrent avoir recours à une contraception d'urgence hormonale. (II-2B) 19. Les fournisseurs de soins devraient discuter d'un plan visant la mise en œuvre d'une contraception continue avec les femmes qui en viennent à utiliser des pilules de contraception d'urgence; ils devraient également offrir des modes adéquats de contraception continue à ces femmes, lorsque celles-ci s'y montrent intéressées. La contraception hormonale devrait être entamée dans les 24 heures suivant l'administration d'une contraception d'urgence faisant appel au lévonorgestrel; de plus, une contraception d'appoint (ou l'abstinence) devrait être mise en œuvre pendant les sept premiers jours suivant le début de l'utilisation d'une contraception hormonale. (III-B) Dans le cas de la contraception d'urgence faisant appel à l'acétate d'ulipristal, la contraception hormonale devrait être entamée cinq jours après l'administration de la contraception d'urgence. Une contraception d'appoint (ou l'abstinence) doit être mise en œuvre pendant les cinq premiers jours suivant l'administration d'une contraception d'urgence faisant appel à l'acétate d'ulipristal, puis pendant les 14 premiers jours suivant le début de l'utilisation d'une contraception hormonale. (III-B) 20. L'acétate d'ulipristal et le lévonorgestrel ne devraient pas être utilisés de façon concomitante à des fins de contraception d'urgence. (III-B) 21. Un test de grossesse devrait être mené en l'absence de menstruations dans les 21 jours suivant l'utilisation de pilules ou l'insertion d'un dispositif intra-utérin au cuivre à des fins de contraception d'urgence. (III-A) 22. Des services de santé devraient être élaborés pour permettre aux Canadiennes d'obtenir un accès en temps opportun à toutes les méthodes efficaces de contraception d'urgence. (III-B).


Assuntos
Anticoncepção/métodos , Canadá , Feminino , Humanos
14.
J Obstet Gynaecol Can ; 37(11): 1033-9, 2015 Nov.
Artigo em Inglês, Francês | MEDLINE | ID: mdl-26629725

RESUMO

OBJECTIVE: To provide guidelines for health care providers on the use of contraceptive methods to prevent pregnancy and on the promotion of healthy sexuality. OUTCOMES: Guidance for Canadian practitioners on overall effectiveness, mechanism of action, indications, contraindications, non-contraceptive benefits, side effects and risks, and initiation of cited contraceptive methods; family planning in the context of sexual health and general well-being; contraceptive counselling methods; and access to, and availability of, cited contraceptive methods in Canada. EVIDENCE: Published literature was retrieved through searches of Medline and The Cochrane Database from January 1994 to January 2015 using appropriate controlled vocabulary (e.g., contraception, sexuality, sexual health) and key words (e.g., contraception, family planning, hormonal contraception, emergency contraception). Results were restricted to systematic reviews, randomized control trials/controlled clinical trials, and observational studies published in English from January 1994 to January 2015. Searches were updated on a regular basis and incorporated in the guideline to June 2015. Grey (unpublished) literature was identified through searching the websites of health technology assessment and health technology-related agencies, clinical practice guideline collections, clinical trial registries, and national and international medical specialty societies. VALUES: The quality of the evidence in this document was rated using the criteria described in the Report of the Canadian Task Force on Preventive Health Care (Table). Chapter 1: Contraception in Canada Summary Statements 1. Canadian women spend a significant portion of their lives at risk of an unintended pregnancy. (II-2) 2. Effective contraceptive methods are underutilized in Canada, particularly among vulnerable populations. (II-2) 3. Long-acting reversible contraceptive methods, including contraceptive implants and intrauterine contraception (copper-releasing and levonorgestrel-releasing devices/systems), are the most effective reversible contraceptive methods and have the highest continuation rates. (II-1) 4. Canada currently does not collect reliable data to determine the use of contraceptive methods, abortion rates, and the prevalence of unintended pregnancy among reproductive-age women. (II-2) 5. A universal subsidy for contraceptive methods as provided by many of Canada's peer nations and a few Canadian provinces may produce health system cost-savings. (II-2) 6. Health Canada approval processes for contraceptives have been less efficient than those of other drug approval agencies and Health Canada processes for other classes of pharmaceuticals. (II-2) 7. It is feasible and safe for contraceptives and family planning services to be provided by appropriately trained allied health professionals such as midwives, registered nurses, nurse practitioners, and pharmacists. (II-2) Recommendations 1. Contraceptive counselling should include a discussion of typical use failure rates and the importance of using the contraceptive method consistently and correctly in order to avoid pregnancy. (II-2A) 2. Women seeking contraception should be counselled on the wide range of effective methods of contraception available, including long-acting reversible contraceptive methods (LARCs). LARCs are the most effective methods of reversible contraception, have high continuation rates, and should be considered when presenting contraceptive options to any woman of reproductive age. (II-2A) 3. Family planning counselling should include counselling on the decline of fertility associated with increasing female age. (III-A) 4. Health policy supporting a universal contraception subsidy and strategies to promote the uptake of highly effective methods as cost-saving measures that improve health and health equity should be considered by Canadian health decision makers. (III-B) 5. Canadian health jurisdictions should consider expanding the scope of practice of other trained professionals such as nurses, nurse practitioners, midwives, and pharmacists and promoting task-sharing in family planning. (II-2B) 6. The Canadian Community Health Survey should include adequate reproductive health indicators in order for health care providers and policy makers to make appropriate decisions regarding reproductive health policies and services in Canada. (III-B) 7. Health Canada processes and policies should be reviewed to ensure a wide range of modern contraceptive methods are available to Canadian women. (III-B) Chapter 2: Contraceptive Care and Access Summary Statements 8. Although there are many contraceptive options in Canada, only a narrow range of contraceptive methods are commonly used by those of reproductive age. (II-3) 9. Condom use decreases with longer relationship tenure and when the sexual partner is considered to be the main partner, likely due to a lower perceived risk of sexually transmitted infection in that relationship. Condom use may also decrease markedly as an unintended consequence when an effective non-barrier method, such as hormonal contraception or intrauterine contraception, is initiated. (II-3) 10. Family planning counselling provides a natural segue into screening for concerns about sexual function or intimate partner violence. (III) 11. Well-informed and well-motivated individuals who have developed skills to practise safer sex behaviours are more likely to use contraceptive and safer sex methods effectively and consistently. (II-2) Recommendations 8. Comprehensive family planning services, including abortion services, should be accessible to all Canadians regardless of geographic location. These services should be confidential, non-judgemental, and respectful of individuals' privacy and cultural contexts. (III-A) 9. A contraceptive visit should include history taking, screening for contraindications, dispensing or prescribing a method of contraception, and exploring contraceptive choice and adherence in the broader context of the individual's sexual behaviour, reproductive health risk, social circumstances, and relevant belief systems. (III-B) 10. Health care providers should provide practical information on the wide range of contraceptive options and their potential non-contraceptive benefits and assist women and their partners in determining the best user-method fit. (III-B) 11. Health care providers should assist women and men in developing the skills necessary to negotiate the use of contraception and the correct and consistent use of a chosen method. (III-B) 12. Contraceptive care should include discussion and management of the risk of sexually transmitted infection, including appropriate recommendations for condom use and dual protection, STI screening, post-exposure prophylaxis, and Hepatitis B and human papillomavirus vaccination. (III-B) 13. Health care providers should emphasize the use of condoms not only for protection against sexually transmitted infection, but also as a back-up method when adherence to a hormonal contraceptive may be suboptimal. (I-A) 14. Health care providers should be aware of current media controversies in reproductive health and acquire relevant evidence-based information that can be briefly and directly communicated to their patients. (III-B) 15. Referral resources for intimate partner violence, sexually transmitted infections, sexual dysfunction, induced abortion services, and child protection services should be available to help clinicians provide contraceptive care in the broader context of women's health. (III-B) Chapter 3: Emergency Contraception Summary Statements 12. The copper intrauterine device is the most effective method of emergency contraception. (II-2) 13. A copper intrauterine device can be used for emergency contraception up to 7 days after unprotected intercourse provided that pregnancy has been ruled out and there are no other contraindications to its insertion. (II-2) 14. Levonorgestrel emergency contraception is effective up to 5 days (120 hours) after intercourse; its effectiveness decreases as the time between unprotected intercourse and ingestion increases. (II-2) 15. Ulipristal acetate for emergency contraception is more effective than levonorgestrel emergency contraception up to 5 days after unprotected intercourse. This difference in effectiveness is more pronounced as the time from unprotected intercourse increases, especially after 72 hours. (I) 16. Hormonal emergency contraception (levonorgestrel emergency contraception and ulipristal acetate for emergency contraception) is not effective if taken on the day of ovulation or after ovulation. (II-2) 17. Levonorgestrel emergency contraception may be less effective in women with a body mass index > 25 kg/m2 and ulipristal acetate for emergency contraception may be less effective in women with a body mass index > 35 kg/m2. However, hormonal emergency contraception may still retain some effectiveness regardless of a woman's body weight or body mass index. (II-2) 18. Hormonal emergency contraception is associated with higher failure rates when women continue to have subsequent unprotected intercourse. (II-2) 19. Hormonal contraception can be initiated the day of or the day following the use of levonorgestrel emergency contraception, with back-up contraception used for the first 7 days. (III) 20. Hormonal contraception can be initiated 5 days following the use of ulipristal acetate for emergency contraception, with back-up contraception used for the first 14 days. (III) Recommendations 16. All emergency contraception should be initiated as soon as possible after unprotected intercourse. (II-2A) 17. Women should be informed that the copper intrauterine device (IUD) is the most effective method of emergency contraception and can be used by any woman with no contraindications to IUD use. (II-3A) 18.


Objectif : Fournir des lignes directrices aux fournisseurs de soins quant à l'utilisation de modes de contraception pour la prévention de la grossesse et quant à la promotion d'une sexualité saine. Issues : Orientation des praticiens canadiens en ce qui concerne l'efficacité globale, le mécanisme d'action, les indications, les contre-indications, les avantages n'étant pas liés à la contraception, les effets indésirables, les risques et le protocole de mise en œuvre des modes de contraception abordés; planification familiale dans le contexte de la santé sexuelle et du bien-être général; méthodes de counseling en matière de contraception; et accessibilité et disponibilité des modes de contraception abordés au Canada. Résultats : La littérature publiée a été récupérée par l'intermédiaire de recherches menées dans MEDLINE et The Cochrane Library entre janvier 1994 et janvier 2015 au moyen d'un vocabulaire contrôlé (p. ex. contraception, sexuality, sexual health) et de mots clés (p. ex. contraception, family planning, hormonal contraception, emergency contraception) appropriés. Les résultats ont été restreints aux analyses systématiques, aux études observationnelles et aux essais comparatifs randomisés / essais cliniques comparatifs publiés en anglais entre janvier 1994 et janvier 2015. Les recherches ont été mises à jour de façon régulière et intégrées à la directive clinique jusqu'en juin 2015. La littérature grise (non publiée) a été identifiée par l'intermédiaire de recherches menées dans les sites Web d'organismes s'intéressant à l'évaluation des technologies dans le domaine de la santé et d'organismes connexes, dans des collections de directives cliniques, dans des registres d'essais cliniques et auprès de sociétés de spécialité médicale nationales et internationales. Valeurs : La qualité des résultats a été évaluée au moyen des critères décrits dans le rapport du Groupe d'étude canadien sur les soins de santé préventifs (Tableau). Chapitre 1 : Contraception au Canada Déclarations sommaires 1. Les Canadiennes sont exposées à des risques de grossesse non planifiée pendant une partie considérable de leur vie. (II-2) 2. Les modes efficaces de contraception sont sous-utilisés au Canada, particulièrement au sein des populations vulnérables. (II-2) 3. Les modes de contraception réversible à action prolongée, dont les implants contraceptifs et la contraception intra-utérine (dispositifs / systèmes à libération de cuivre ou de lévonorgestrel), sont les modes de contraception réversible les plus efficaces; de plus, ils comptent les taux les plus élevés de poursuite du traitement. (II-1) 4. Au Canada à l'heure actuelle, nous ne recueillons pas de données fiables qui permettraient d'établir le taux d'utilisation des modes de contraception, le taux d'avortement et la prévalence des grossesses non planifiées chez les femmes en âge de procréer. (II-2) 5. L'octroi d'une subvention universelle destinée aux modes de contraception, à l'instar de bon nombre d'autres pays et de quelques provinces canadiennes, pourrait générer des économies pour le système de santé. (II-2) 6. Dans le cas des contraceptifs, les processus d'homologation de Santé Canada ont été moins efficaces que ceux d'autres organismes d'homologation, en plus d'être moins efficaces que les processus qu'elle a elle-même mis en vigueur en ce qui concerne d'autres catégories de produits pharmaceutiques. (II-2) 7. L'offre de contraceptifs et de services de planification familiale par des professionnels paramédicaux (tels que les sages-femmes, les infirmières autorisées, les infirmières praticiennes et les pharmaciens) ayant bénéficié d'une formation adéquate est faisable et sûre. (II-2) Recommandations 1. Les services de counseling traitant de la contraception devraient comprendre une discussion au sujet des taux d'échec liés à l'utilisation typique et de l'importance d'utiliser régulièrement et correctement le mode de contraception choisi, de façon à éviter la grossesse. (II-2A) 2. Les services de counseling offerts aux femmes qui cherchent à se prévaloir d'un mode de contraception devraient porter sur la vaste gamme des modes efficaces disponibles, y compris sur les modes de contraception réversible à action prolongée. Ces derniers sont les modes les plus efficaces de contraception réversible, comptent des taux élevés de poursuite du traitement et devraient être pris en considération, pour toutes les femmes en âge de procréer, au moment d'aborder avec celles-ci les options de contraception qui s'offrent à elles. (II-2A) 3. Les services de counseling en matière de planification familiale devraient aborder la question du déclin de la fertilité qui est associé au vieillissement chez la femme. (III-A) 4. Les décideurs canadiens du domaine de la santé devraient envisager la mise en œuvre de politiques de santé soutenant l'offre universelle d'une subvention à la contraception et de stratégies visant à promouvoir l'adoption de modes de contraception grandement efficaces, et ce, à titre de mesures de réduction des coûts permettant l'amélioration de la santé et de l'équité en matière de santé. (III-B) 5. Les territoires de compétence canadiens en matière de santé devraient envisager d'élargir le champ de pratique d'autres professionnels formés (comme les infirmières, les infirmières praticiennes, les sages-femmes et les pharmaciens) et de promouvoir le partage des tâches en planification familiale. (II-2B) 6. L'Enquête sur la santé dans les collectivités canadiennes devrait englober des indicateurs adéquats en matière de santé génésique, de façon à pouvoir permettre aux fournisseurs de soins de santé et aux décideurs de prendre des décisions opportunes à l'égard des politiques et des services de santé génésique au Canada. (III-B) 7. Les processus et les politiques de Santé Canada devraient être passés en revue pour que l'on puisse s'assurer qu'ils ne nuisent pas indûment à l'offre d'une vaste gamme de modes de contraception modernes aux Canadiennes. (III-B) Chapitre 2 : Soins en matière de contraception et accès à la contraception Déclarations sommaires 8. Bien que le Canada compte de nombreuses options en matière de contraception, les modes de contraception couramment utilisés par les femmes en âge de procréer sont issus d'une gamme restreinte. (II-3) 9. L'utilisation du condom diminue au fur et à mesure que se poursuit une relation et lorsque le partenaire sexuel est considéré comme étant le partenaire principal, probablement en raison d'une baisse du risque perçu d'infections transmissibles sexuellement au sein de la relation en question. L'utilisation du condom pourrait, de façon fortuite, également connaître une baisse marquée à la suite de la mise en œuvre d'un mode de contraception efficace ne faisant pas partie des méthodes de barrière (comme la contraception hormonale ou intra-utérine). (II-3) 10. Le counseling en matière de planification familiale peut naturellement mener au dépistage de la violence conjugale et des problèmes liés à la fonction sexuelle. (III) 11. Les personnes bien renseignées et bien motivées qui ont acquis les compétences nécessaires à la pratique de comportements sexuels à risques réduits sont plus susceptibles d'utiliser des modes de contraception et des pratiques sexuelles à risques réduits de façon efficace et systématique. (II-2) Recommandations 8. Des services exhaustifs de planification familiale (y compris des services d'avortement) devraient être offerts à tous les Canadiens, peu importe leur emplacement géographique. Ces services devraient être confidentiels et assurer le respect de la vie privée et des contextes culturels des personnes qui les utilisent. (III-A) 9. Les consultations en matière de contraception devraient comprendre une anamnèse, un dépistage des contre-indications, l'offre ou la prescription d'un mode de contraception, ainsi que l'exploration des choix en matière de contraception et des facteurs associés à l'observance dans le cadre élargi du comportement sexuel, des risques liés à la santé génésique, du contexte social et des croyances de la femme en question. (III-B) 10. Les fournisseurs de soins devraient offrir des renseignements pratiques sur la vaste gamme des options en matière de contraception et sur leurs avantages potentiels n'étant pas liés à la contraception, en plus d'aider les femmes et leurs partenaires à choisir le mode de contraception étant le mieux adapté à leurs besoins. (III-B) 11. Les fournisseurs de soins devraient aider les femmes et les hommes à acquérir les compétences nécessaires à la négociation du recours à la contraception, ainsi qu'à l'utilisation correcte et systématique du moyen de contraception choisi. (III-B) 12. Les soins en matière de contraception devraient aborder les risques de contracter des infections transmissibles sexuellement et en assurer la prise en charge; ils devraient, à ce chapitre, être fondés sur la formulation de recommandations appropriées en ce qui concerne l'utilisation de condoms et d'une protection double, le dépistage des infections transmissibles sexuellement, la prophylaxie post-exposition et la vaccination contre l'hépatite B et le virus du papillome humain. (III-B) 13. Les fournisseurs de soins devraient souligner que l'utilisation de condoms n'a pas seulement pour but de conférer une protection contre les infections transmissibles sexuellement, mais qu'elle agit également à titre de méthode d'appoint lorsque l'observance envers un contraceptif hormonal pourrait être sous-optimale. (I-A) 14. Les fournisseurs de soins devraient se tenir au fait des controverses médiatiques qui font rage dans le domaine de la santé génésique et obtenir les données factuelles pertinentes qui pourront être communiquées (de façon brève et directe) à leurs patientes. (III-B) 15. Des ressources spécialisées en ce qui concerne la violence conjugale, les infections transmissibles sexuellement, le dysfonctionnement sexuel, lesservices d'avortement provoqué et les services de protection de l'enfance devraient être disponibles pour aider les cliniciens à offrir des soins en matière de contraception dans le contexte élargi de la santé des femmes. (III-B) Chapitre 3 : Contraception d'urgence Déclarations sommaires 12. Le dispositif intra-utérin au cuivre constitue la méthode de contraception d'urgence la plus efficace. (II-2) 13. Un dispositif intra-utérin au cuivre peut être utilisé à des fins de contraception d'urgence jusqu'à sept jours à la suite d'une relation sexuelle non protégée, pour autant que la présence d'une grossesse ait été écartée et qu'il n'existe aucune autre contre-indication à son insertion. (II-2) 14. La contraception d'urgence au lévonorgestrel est efficace jusqu'à cinq jours (120 heures) à la suite d'une relation sexuelle non protégée; son efficacité diminue au fur et à mesure que s'allonge le délai entre la relation sexuelle non protégée et son administration. (II-2) 15. La contraception d'urgence à l'acétate d'ulipristal est plus efficace que celle qui fait appel au lévonorgestrel, et ce, jusqu'à cinq jours à la suite d'une relation sexuelle non protégée. Cette différence en matière d'efficacité devient plus prononcée au fur et à mesure que s'allonge le délai entre la relation sexuelle non protégée et l'administration, particulièrement après 72 heures. (I) 16. La contraception d'urgence hormonale (au lévonorgestrel ou à l'acétate d'ulipristal) n'est pas efficace lorsqu'elle est administrée le jour de l'ovulation ou par la suite. (II-2) 17. La contraception d'urgence au lévonorgestrel pourrait être moins efficace chez les femmes dont l'indice de masse corporelle est supérieur à 25 kg/m2, tandis que la contraception d'urgence à l'acétate d'ulipristal pourrait être moins efficace chez les femmes dont l'indice de masse corporelle est de 35 kg/m2 ou plus. Quoi qu'il en soit, la contraception d'urgence hormonale pourrait tout de même conserver une certaine efficacité, peu importe le poids ou l'indice de masse corporelle de la femme qui en fait la demande. (II-2) 18. La contraception d'urgence hormonale est associée à des taux d'échec plus élevés lorsque les femmes qui l'utilisent continuent par la suite à connaître des relations sexuelles non protégées. (II-2) 19. Une contraception hormonale peut être entamée le jour de l'utilisation d'une contraception d'urgence au lévonorgestrel, ou le jour suivant celle-ci, en s'assurant de mettre en œuvre une contraception d'appoint pendant les sept premiers jours. (III) 20. Une contraception hormonale peut être entamée cinq jours à la suite de l'utilisation d'une contraception d'urgence à l'acétate d'ulipristal, en s'assurant de mettre en œuvre une contraception d'appoint pendant les quatorze premiers jours. (III) Recommandations 16. La contraception d'urgence, toutes méthodes confondues, devrait être mise en œuvre dès que possible à la suite d'une relation sexuelle non protégée. (II-2A) 17. Les femmes devraient être avisées que le dispositif intra-utérin au cuivre constitue la méthode de contraception d'urgence la plus efficace et que ce dispositif peut être utilisé par toute femme qui ne présente pas de contre-indications à son utilisation. (II-3A) 18. Les fournisseurs de soins ne devraient pas déconseiller l'utilisation de la contraception d'urgence hormonale en fonction de l'indice de masse corporelle de la femme qui en fait la demande. L'utilisation d'un dispositif intra-utérin au cuivre à des fins de contraception d'urgence devrait être recommandée pour les femmes présentant un indice de masse corporelle supérieur à 30 kg/m2 qui sollicitent une contraception d'urgence. En présence de conditions favorables en matière d'accessibilité et de coût, la contraception d'urgence faisant appel à l'acétate d'ulipristal devrait constituer l'option de première intention à offrir aux femmes présentant un indice de masse corporelle de 25 kg/m2 ou plus qui préfèrent avoir recours à une contraception d'urgence hormonale. (II-2B) 19. Les fournisseurs de soins devraient discuter d'un plan visant la mise en œuvre d'une contraception continue avec les femmes qui en viennent à utiliser des pilules de contraception d'urgence; ils devraient également offrir des modes adéquats de contraception continue à ces femmes, lorsque celles-ci s'y montrent intéressées. La contraception hormonale devrait être entamée dans les 24 heures suivant l'administration d'une contraception d'urgence faisant appel au lévonorgestrel; de plus, une contraception d'appoint (ou l'abstinence) devrait être mise en œuvre pendant les sept premiers jours suivant le début de l'utilisation d'une contraception hormonale. (III-B) Dans le cas de la contraception d'urgence faisant appel à l'acétate d'ulipristal, la contraception hormonale devrait être entamée cinq jours après l'administration de la contraception d'urgence. Une contraception d'appoint (ou l'abstinence) doit être mise en œuvre pendant les cinq premiers jours suivant l'administration d'une contraception d'urgence faisant appel à l'acétate d'ulipristal, puis pendant les 14 premiers jours suivant le début de l'utilisation d'une contraception hormonale. (III-B) 20. L'acétate d'ulipristal et le lévonorgestrel ne devraient pas être utilisés de façon concomitante à des fins de contraception d'urgence. (III-B) 21. Un test de grossesse devrait être mené en l'absence de menstruations dans les 21 jours suivant l'utilisation de pilules ou l'insertion d'un dispositif intra-utérin au cuivre à des fins de contraception d'urgence. (III-A) 22. Des services de santé devraient être élaborés pour permettre aux Canadiennes d'obtenir un accès en temps opportun à toutes les méthodes efficaces de contraception d'urgence. (III-B).


Assuntos
Consenso , Anticoncepção , Canadá , Feminino , Humanos , Masculino , Gravidez
15.
Hum Reprod ; 29(2): 242-52, 2014 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-24291662

RESUMO

STUDY QUESTION: Can a specifically acting synthetic spermicide (DSE-37) be combined with a natural microbicide (saponins) for safe, prophylactic contraception? SUMMARY ANSWER: A 1:1 (w/w) combination of DSE-37 and Sapindus saponins can target sperm and Trichomonas vaginalis precisely without any noticeable off-target effects on somatic cells at effective concentrations. WHAT IS KNOWN ALREADY: Broad-spectrum vaginal agents like nonoxynol-9 (N-9) and cellulose sulfate have failed clinically as microbicides due to non-specific off-target effects, whereas agents that specifically target retroviruses have shown promise in clinical trials. DSE-37 and Sapindus saponins, respectively, specifically target human sperm and T. vaginalis in vitro. STUDY DESIGN, SIZE, DURATION: A comprehensive study of efficacy and safety was undertaken using in vitro (human cells) and in vivo (rabbit) models. The 1:1 combination of DSE-37 and Sapindus saponins was based on the in vitro spermicidal and anti-Trichomonal activities of the two components. N-9, the spermicide in clinical use, served as reference control. Free sperm thiols were fluorescently glinted to reveal differences in the targets of the test agents. PARTICIPANTS/MATERIALS, SETTING, METHODS: On/off-target effects were evaluated in vitro against human sperm, T. vaginalis, HeLa, Vk2/E6E7, End1/E6E7 and Lactobacillus jensenii, using standard assays of drug susceptibility, cell viability, flow cytometric assessment of cell apoptosis and qPCR for expression of pro-inflammatory cytokine mRNAs. The spermicidal effect was also recorded live and free thiols on sperm were fluorescently visualized using a commercial kit. In vivo contraceptive efficacy (pregnancy/fertility rates) and safety (vaginal histopathology and in situ immune-labeling of inflammation markers VCAM-1, E-selectin and NFkB) were evaluated in rabbits. MAIN RESULTS AND THE ROLE OF CHANCE: A 0.003% drug 'combination' containing 0.0015% each of DSE-37 and Sapindus saponins in physiological saline irreversibly immobilized 100% human sperm in ∼30 s and eliminated 100% T. vaginalis in 24 h, without causing any detectable toxicity to human cervical (HeLa) cells and Lactobacilli in 24-48 h, in vitro. N-9 at 0.003% exhibited lower microbicidal activity against Trichomonas but failed in spermicidal assays while causing severe toxicity to HeLa cells and Lactobacilli in 12-24 h. The 'combination' of DSE-37 and Sapindus saponins completely prevented pregnancy in rabbits at a vaginal dose of 20 mg (1% in K-Y Jelly), while application of 5% 'combination' in K-Y Jelly for 4 consecutive days caused negligible alterations in epithelial lining of rabbit vagina with only minor changes in levels of inflammation markers. N-9 at a 20 mg vaginal dose prevented pregnancy in 33% animals and a 4-day repeat application of 2% N-9 gel caused severe local toxicity to vaginal epithelium with molecular expression of acute inflammation markers. LIMITATIONS, REASONS FOR CAUTION: The number of animals used for the in vivo efficacy study was limited by the approval of the animal ethics committee. WIDER IMPLICATIONS OF THE FINDINGS: Anti-Trichomonal contraceptives with specifically acting synthetic component and clinically-proven safe natural component may define a new concept in empowering women to control their fertility and reproductive health. STUDY FUNDING/COMPETING INTEREST(S): The study was funded by CSIR-Network Project 'PROGRAM' (BSC0101) and partly by the Ministry of Health and Family Welfare, Government of India (GAP0001). The funding agencies did not play any role in this study and none of the authors had any competing interest(s).


Assuntos
Aminoquinolinas/química , Anti-Infecciosos/administração & dosagem , Anticoncepcionais/uso terapêutico , Espermicidas/administração & dosagem , Animais , Dissulfetos/química , Feminino , Células HeLa , Humanos , Inflamação , L-Lactato Desidrogenase/metabolismo , Masculino , Potencial da Membrana Mitocondrial , Faloidina/química , Coelhos , Sapindus/metabolismo , Sêmen/efeitos dos fármacos , Espermatozoides/patologia , Tensão Superficial , Tensoativos/química , Trichomonas vaginalis/metabolismo
16.
Bioorg Med Chem Lett ; 24(24): 5782-5786, 2014 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-25453819

RESUMO

A series of seventeen morpholin/piperidin-1-yl-carbamodithioate (3-19) were synthesized as topical vaginal microbicidal spermicides. The synthesized compounds were evaluated for their anti-Trichomonas activity against MTZ susceptible and resistant strains along with their spermicidal and antifungal potential. All the synthesized compounds were assessed for their safety through cytotoxic assay against human cervical cell line (HeLa) and compatibility with vaginal flora, Lactobacillus. The study identified eleven dually active compounds with apparent safety. The plausible mode of action of these compounds was through sulfhydryl binding, confirmed via reduction in available free thiols on human sperm. The most promising compound 9 significantly inhibited (P<0.001) thiol-sensitive sperm hexokinase. The stability of compound 9 in simulated vaginal fluid (SVF) was performed via HPLC-PDA method, which supported its utility for vaginal administration.


Assuntos
Antifúngicos/síntese química , Desenho de Fármacos , Piperidinas/síntese química , Espermicidas/síntese química , Compostos de Sulfidrila/química , Tiocarbamatos/síntese química , Antifúngicos/farmacologia , Antifúngicos/toxicidade , Sobrevivência Celular/efeitos dos fármacos , Feminino , Células HeLa , Hexoquinase/antagonistas & inibidores , Hexoquinase/metabolismo , Humanos , Lactobacillus/efeitos dos fármacos , Masculino , Testes de Sensibilidade Microbiana , Morfolinas/química , Piperidinas/química , Piperidinas/farmacologia , Piperidinas/toxicidade , Espermicidas/farmacologia , Espermicidas/toxicidade , Espermatozoides/efeitos dos fármacos , Espermatozoides/enzimologia , Relação Estrutura-Atividade , Compostos de Sulfidrila/farmacologia , Compostos de Sulfidrila/toxicidade , Tiocarbamatos/farmacologia , Tiocarbamatos/toxicidade , Trichomonas vaginalis/efeitos dos fármacos
17.
Reprod Health Matters ; 22(44): 213-7, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-25555778

RESUMO

Global statistics on unplanned pregnancies, abortions and STIs show that unprotected sex is still widely practised. More needs to be done to provide women and men with a wider choice of convenient protective options. To address this need, international efforts are focusing on developing multipurpose prevention technologies (MPTs) that address two or more indications simultaneously. These technologies would have significant advantages over single-indication products. They include inter alia novel barrier devices, drugs administered either as oral tablets or vaginal/rectal gels, drugs used in combination with medical devices, and genetically engineered organisms which secrete antimicrobial substances. As an example of progress in the MPT field, this paper describes an on-demand contraceptive/antimicrobial vaginal gel, Amphora (previously known as Acidform), now in an advanced stage of development. Clinical trials are currently being planned to find out whether this product's promising antimicrobial profile translates into protective and preventive choices.


Assuntos
Anticoncepção/métodos , Anticoncepcionais/farmacologia , Infecções Sexualmente Transmissíveis/prevenção & controle , Feminino , Infecções por HIV/prevenção & controle , Humanos , Masculino , Medicina Preventiva , Saúde Reprodutiva , Comportamento Sexual
18.
Eur J Contracept Reprod Health Care ; 19(6): 465-74, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25160062

RESUMO

OBJECTIVE: To determine the minimum effective concentration (MEC) of an imbibing and soluble nonoxynol-9 (N-9) diaphragm (ISND) required for immobilisation of all spermatozoa in vitro and in vivo. The speed of semen absorbance, time of ISND to dissolution, and the antifertility effects were also investigated in rabbits. METHODS: In vitro spermicidal tests with ISND were conducted using fresh semen from humans and rabbits. Spermicidal and antifertility effects were observed in vivo after the ISND was placed directly into the vagina of rabbits. RESULTS: The MEC of N-9 required in the ISND to totally immobilise sperm within 20 seconds was 0.15 mg/ml for human sperm, and 0.5 mg/ml for rabbit sperm. The human semen was absorbed into the ISND in 45 minutes; the diaphragm dissolved in the vagina 3.5 hours later. In vivo, in rabbits, the MEC of N-9 required to immobilise sperm within five minutes of mating was 1 mg/kg in the ISND, and 10 mg/kg for the nonoxynol-9 film. The median effective dose of N-9 in the ISND was 1.07 mg/kg, whereas for the film it was 3.30 mg/kg. CONCLUSION: The spermicidal and antifertility activities of a low dose N-9 in the ISND were high, with properties of imbibition and solubility confirmed.


Assuntos
Dispositivos Anticoncepcionais Femininos , Nonoxinol/administração & dosagem , Espermicidas/administração & dosagem , Animais , Feminino , Humanos , Masculino , Nonoxinol/farmacologia , Coelhos , Sêmen , Motilidade dos Espermatozoides/efeitos dos fármacos , Espermicidas/farmacologia , Espermatozoides/efeitos dos fármacos
19.
Nat Prod Res ; : 1-8, 2024 May 14.
Artigo em Inglês | MEDLINE | ID: mdl-38742440

RESUMO

Doryopteris raddiana (Presl) Fée, a traditional contraceptive in Mbya culture, lacks scientific scrutiny regarding its chemical composition and contraceptive efficacy. Employing X-ray fluorescence, Fourier-transform infrared spectroscopy, and thermal analysis, we explored the plant's organs. Multielemental analysis excluded toxic elements. Key phytoconstituents identified by gas chromatography-mass spectrometry in the extracts obtained through infusion were glycerine, 1,3-dimethyl propane, and catechol in leaves; glycerine, cis-13-octadecenoic acid methyl ester, and 2-deoxy-D-erythro-pentose in stems and roots. Among these chemicals, glycerine emerged as the sole constituent with contraceptive potential, particularly intravaginally. Extract activity tests conducted on ram spermatozoa exhibited a reduction in the percentage of rapid spermatozoa but no significant impact on total motility, progressive motility, or viability. The reported data would only weakly support the advocated contraceptive action of this fern upon vaginal application, not through the oral administration of its decoction.

20.
J Gynecol Obstet Hum Reprod ; 52(7): 102616, 2023 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-37270106

RESUMO

OBJECTIVE: This multicenter prospective study (BZK40+) aims to determine the efficacy and tolerance of a benzalkonium chloride-containing spermicide as contraceptive among women aged 40 and over. PROCEDURE: Fertile women enrolled in this open single-arm study were instructed to systematically use the benzalkonium chloride spermicide before each intercourse. At the end of a 6-month mandatory period, participants were given the option of continuing the study for a further 6 months. The primary endpoint for contraceptive efficacy was the Pearl Index (PI) up to 12 months of typical use. MAIN FINDINGS: A total of 151 women (mean age: 45.9 years) were enrolled, 144 (95.4%) completed the initial 6-month period and 63 (41.7%) completed the optional 6-month period. The median number of intercourses ranged from 3 to 5 per month. The spermicide was applied before 96.3% of the 5,895 sexual intercourses. The PI up to 12 months of typical use was 0 pregnancies (95% confidence interval: 0-2.88). The cumulative treatment exposure was 1249.7 women-months. CONCLUSION: This first study in women aged 40 years and over shows that benzalkonium chloride spermicide (Pharmatex®) is effective, well tolerated and well accepted in this population. Although very interesting, these results with a PI equal to zero are surprising and not in accordance with the low efficacy of spermicides in the overall population according to the WHO. So, our results should be interpreted with caution and confirmed by future research. Clinical trial registration number (EudraCT): 2016-004,188-38.


Assuntos
Compostos de Benzalcônio , Espermicidas , Gravidez , Feminino , Humanos , Adulto , Pessoa de Meia-Idade , Estudos Prospectivos , Compostos de Benzalcônio/efeitos adversos , Anticoncepção , Anticoncepcionais , Espermicidas/uso terapêutico
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