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1.
J Clin Rheumatol ; 28(6): 305-313, 2022 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-35612587

RESUMO

BACKGROUND: A patient-centered approach is essential for promoting sexual health (SH) and reproductive health (RH) in rheumatoid arthritis patients. The study aimed to describe and interpret Mexican rheumatoid arthritis outpatients' testimonies of their SH and RH definitions. METHODS: Qualitative and quantitative content analysis was conducted on free-text comments from 219 and 223 descriptions of patients' SH and RH definitions, respectively. A comprehensive system of major themes, categories, and subcategories was structured for each definition. The representational foundations of these categories and the context of their production were analyzed. Integration of quantitative and qualitative content analysis was used to comprehend patients' definitions of SH and RH. Internal review board approved the study. RESULTS: Ten major themes emerged for each definition, and their assigned frequencies differed between SH and RH definitions, and between groups of patients integrated according to age, education level, and sex. Both definitions had similar contents, expressed in the shared major themes and categories, and in managing at the same time SH- and RH-related contents within each definition. The "overall prevention-patient oriented care" major theme defined a common core for both definitions' contents. Meanwhile, a diversity of meanings was also evident particularly at the subcategory level. CONCLUSIONS: In our population, SH content was distinguished by related diseases and their consequences, individual actions directed to prevention, and couple mentions. Meanwhile, RH was distinguished by a primarily biological perspective of the reproductive function, which was required at a particular life stage to concrete a family project.


Assuntos
Artrite Reumatoide , Saúde Sexual , Humanos , Saúde Reprodutiva , Comportamento Sexual
2.
Reproduction ; 156(6): 477-486, 2018 12.
Artigo em Inglês | MEDLINE | ID: mdl-30328343

RESUMO

When levonorgestrel (LNG) is given for emergency contraception during the follicular phase, it not only inhibits or delays ovulation, but also induces changes in endometrial secretions that modulate sperm functionality. In order to characterize the female reproductive tract secreted molecules that may affect human spermatozoa, we analyzed changes in the protein content of uterine flushings obtained from women during the periovulatory phase of a control and a LNG-treated menstrual cycle. Lectin affinity analysis and 2D gel electrophoresis of uterine samples showed changes in protein glycosylation patterns and the presence of 31 differentially expressed proteins (8 upregulated and 23 downregulated). Mass spectrometry and Western blot analyses of the differential expressed proteins showed lactotransferrin (LTF) as one of the upregulated molecules by LNG. In this study, LTF exhibited significant dose-related effects on sperm functionality, particularly a decrease of calcium ionophore-induced acrosome reaction and protein tyrosine phosphorylation. Overall, the results indicated that LNG promoted changes in the proteome of uterine secretions that might compromise human sperm capacitation. These data further support the participation of other mechanisms of action of LNG as emergency contraceptive, in addition to those on ovulation.


Assuntos
Contraceptivos Hormonais/uso terapêutico , Fase Folicular/efeitos dos fármacos , Lactoferrina/metabolismo , Lactoferrina/farmacologia , Levanogestrel/uso terapêutico , Espermatozoides/efeitos dos fármacos , Útero/efeitos dos fármacos , Reação Acrossômica/efeitos dos fármacos , Adulto , Ionóforos de Cálcio/farmacologia , Feminino , Fase Folicular/metabolismo , Glicosilação , Humanos , Masculino , Ovulação/efeitos dos fármacos , Fosforilação , Espermatozoides/metabolismo , Tirosina/metabolismo , Útero/metabolismo , Adulto Jovem
3.
Reproduction ; 154(5): 607-614, 2017 11.
Artigo em Inglês | MEDLINE | ID: mdl-28887327

RESUMO

Levonorgestrel (LNG), a synthetic 19 nor-testosterone derivative, is widely used for emergency contraception. It is well known that LNG prevents ovulation only when given prior to the surge of serum luteinizing hormone (LH) during the periovulatory phase of the menstrual cycle. This observation suggests that LNG, given its contraceptive efficacy, has additional effects other than those affecting ovulation. In this study, we have evaluated the effects on human sperm functionality of uterine flushings (UF) obtained from women at day LH + 1 of a control cycle (CTR-LH + 1) and after receiving LNG (LNG-LH + 1) two days before the surge of LH. Human sperm from normozoospermic donors were incubated with UF and protein tyrosine phosphorylation, sperm motility, acrosome reaction as well as zona pellucida (ZP) binding capacity were assessed. A significant decrease in total motility and tyrosine phosphorylation accompanied by an increase on spontaneous acrosome reaction was observed when sperm were incubated in the presence of LNG-LH + 1. None of these effects were mimicked by purified glycodelin A (GdA). Moreover, the addition of UF obtained during the periovulatory phase from LNG-treated women or the presence of purified GdA significantly decreased sperm-ZP binding. The data were compatible with changes affecting sperm capacitation, motility and interaction with the ZP. These results may offer evidence on additional mechanisms of action of LNG as an emergency contraceptive.


Assuntos
Líquidos Corporais , Anticoncepcionais Femininos/uso terapêutico , Levanogestrel/uso terapêutico , Espermatozoides/efeitos dos fármacos , Irrigação Terapêutica , Útero/patologia , Reação Acrossômica/efeitos dos fármacos , Adulto , Líquidos Corporais/efeitos dos fármacos , Líquidos Corporais/fisiologia , Anticoncepcionais Femininos/farmacologia , Feminino , Humanos , Técnicas In Vitro , Levanogestrel/farmacologia , Masculino , Capacitação Espermática/efeitos dos fármacos , Espermatozoides/fisiologia
4.
PLoS One ; 16(1): e0245538, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33507948

RESUMO

BACKGROUND: Rheumatoid arthritis (RA) impacts sexual and reproductive health (SRH), which is a prominent component of a patient´s quality of life and highly influenced by the cultural background. The aim of the study was to explore the interest of Mexican outpatients with RA in SRH and to examine patient view on SRH. METHODS: This cross-sectional study surveyed 303 consecutive outpatients with RA on their perceptions of SRH importance, SRH satisfaction, access to SRH information, preferences regarding SRH communication with healthcare professionals, and understanding of SRH (qualitative open-ended descriptions). Descriptive statistics and inferential analysis were used. Patient knowledge of each dimension of SRH was rated based on pre-specified criteria. Two assessors assigned ten major themes to each patient´s description of both dimensions of SRH. RESULTS: Patients perceived their SRH as an important component of their general health and wished to address the topic, although few had access to such communication. Female patients assigned lesser importance to SRH, showed lesser degree of satisfaction with SRH, and expressed preference for a truthful physician. Age showed a linear association with individual survey responses, except for satisfaction with reproductive health dimension. There was a linear association between increased age and decreased years of formal education with a lower level of SRH knowledge. Ten major themes emerged for each of the two dimensions of the SRH construct, although most individual descriptions were assigned to one or two major themes. CONCLUSIONS: Further education and assessment of SRH in Mexican patients with RA is warranted.


Assuntos
Artrite Reumatoide/psicologia , Conhecimentos, Atitudes e Prática em Saúde , Saúde Reprodutiva , Saúde Sexual , Adulto , Estudos Transversais , Feminino , Humanos , Masculino , México , Pessoa de Meia-Idade , Inquéritos e Questionários
5.
Am J Reprod Immunol ; 86(3): e13434, 2021 09.
Artigo em Inglês | MEDLINE | ID: mdl-33905581

RESUMO

PROBLEM: The cAMP pathway is involved in important biological processes including immune regulation and hormone signaling. At the feto-maternal unit, cAMP participates in placental function/physiology and the establishment of immunoendocrine networks. Low cAMP in male fetuses cord blood has been linked to poorer perinatal outcomes; however, cAMP placental content and its relationship with immune factors and fetal sex in an infectious condition have not been investigated. METHOD OF STUDY: Sex-dependent changes in cAMP content and its association with cytokines and antimicrobial peptides expression were studied in human placentas collected from normal pregnancies and with urinary tract infections (UTI). Radioimmunoassay was used to quantify cAMP in placental tissue, while immune markers expression was studied by qPCR. Additionally, cAMP effect on antimicrobial peptides expression was studied in cultured trophoblasts challenged with lipopolysaccharide, to mimic an infection. RESULTS: In UTI, placentas from female neonates had higher cAMP tissue content and increased expression of TNFA, IL1B, and IL10 than those from males, where IFNG was more elevated. While cAMP negatively correlated with maternal bacteriuria and IFNG, it positively correlated with the antimicrobial peptide S100A9 expression in a sex-specific fashion. In cultured trophoblasts, cAMP significantly stimulated ß-defensin-1 while reduced the lipopolysaccharide-dependent stimulatory effect on ß-defensin-2, ß-defensins-3, and S100A9. CONCLUSION: Our results showed higher cAMP content and defense cytokines expression in placentas associated with female neonates from pregnancies complicated by UTI. The associations between cAMP and bacteriuria/immune markers, together with cAMP's ability to differentially regulate placental antimicrobial peptides expression, suggest a dual modulatory role for cAMP in placental immunity.


Assuntos
AMP Cíclico/imunologia , Citocinas/imunologia , Placenta/imunologia , Complicações Infecciosas na Gravidez/imunologia , Infecções Urinárias/imunologia , Estudos Transversais , AMP Cíclico/metabolismo , Feminino , Humanos , Recém-Nascido , Masculino , Placenta/metabolismo , Gravidez , Complicações Infecciosas na Gravidez/metabolismo , Caracteres Sexuais , Infecções Urinárias/metabolismo
6.
Salud Publica Mex ; 51(3): 255-61, 2009.
Artigo em Espanhol | MEDLINE | ID: mdl-19967312

RESUMO

There is still controversy regarding the mechanism of action of levonorgestrel (LNG) for emergency contraception (EC). For those who state that pregnancy starts prior to implantation, any compound able to interfere with post-fertilization and pre-implantation stages, should be considered as abortifacient. Previous research suggests that EC in humans acts predominantly after fertilization. Current evidence with LNG-only EC supports a pre-fertilization mechanisms to explain its action. There are many potential mechanisms of action, which could vary pending on the day during the fertilization window of the ovarian cycle at which the contraceptive is given. This paper reviews the evidence for each potential mechanism of action. According to the most recently statements, it is concluded that the primary and possible the only mechanism of action of LNG-only EC is preventing or delaying ovulation.


Assuntos
Anticoncepção Pós-Coito , Anticoncepcionais Pós-Coito/farmacologia , Animais , Feminino , Humanos , Modelos Animais
7.
Mol Cell Endocrinol ; 485: 88-96, 2019 04 05.
Artigo em Inglês | MEDLINE | ID: mdl-30796948

RESUMO

The aim of this study was to analyze the effects of progesterone withdrawal on gene transcription in receptive endometrium by the administration of a single dose of 50 mg of the anti-progesterone receptor mifepristone (MFP) at the time of follicle rupture (FR). Six volunteer ovulatory women were studied, taking endometrial biopsies of three control and three MFP-treated women on days LH+2 (C-LH+2) and LH+7 (T-MFP), respectively. The biopsies were prepared for RNA isolation or histological and immunohistochemistry studies. The genomic data from 14 women (C-LH+7) were included as a historical control. The functional genomic analysis of the differentially expressed genes showed that MFP interfered negatively with the bio-functions decidualization of uterus and implantation of blastocyst and embryo. The results of this study confirm but also give new information on how MFP affects endometrial gene expression when administered at the time of FR and the dose used in emergency contraception.


Assuntos
Endométrio/química , Perfilação da Expressão Gênica/métodos , Redes Reguladoras de Genes/efeitos dos fármacos , Antagonistas de Hormônios/administração & dosagem , Mifepristona/administração & dosagem , Adulto , Estudos de Casos e Controles , Endométrio/efeitos dos fármacos , Feminino , Regulação da Expressão Gênica/efeitos dos fármacos , Ontologia Genética , Genômica/métodos , Humanos , Mifepristona/farmacologia , Ovulação/efeitos dos fármacos , Adulto Jovem
8.
Mol Cell Endocrinol ; 476: 70-78, 2018 11 15.
Artigo em Inglês | MEDLINE | ID: mdl-29709683

RESUMO

In order to get further information on the effects of ulipristal acetate (UPA) upon the process of decidualization of endometrium, a functional analysis of the differentially expressed genes in endometrium (DEG) from UPA treated-versus control-cycles of normal ovulatory women was performed. A list of 1183 endometrial DEG, from a previously published study by our group, was submitted to gene ontology, gene enrichment and ingenuity pathway analyses (IPA). This functional analysis showed that decidualization was a biological process overrepresented. Gene set enrichment analysis identified LIF, PRL, IL15 and STAT3 among the most down-regulated genes within the JAK STAT canonical pathway. IPA showed that decidualization of uterus was a bio-function predicted as inhibited by UPA. The results demonstrated that this selective progesterone receptor modulator, when administered during the periovulatory phase of the menstrual cycle, may affect the molecular mechanisms leading to endometrial decidualization in response to progesterone during the period of maximum embryo receptivity.


Assuntos
Decídua/fisiologia , Endométrio/fisiologia , Ciclo Menstrual/efeitos dos fármacos , Norpregnadienos/administração & dosagem , Norpregnadienos/farmacologia , Ovulação/efeitos dos fármacos , Adulto , Biomarcadores/metabolismo , Biópsia , Decídua/efeitos dos fármacos , Endométrio/efeitos dos fármacos , Feminino , Regulação da Expressão Gênica/efeitos dos fármacos , Humanos , Acetato de Medroxiprogesterona/farmacologia , Mifepristona/farmacologia , Modelos Biológicos , Transdução de Sinais/efeitos dos fármacos , Transcrição Gênica/efeitos dos fármacos
9.
Mol Cell Endocrinol ; 439: 337-345, 2017 01 05.
Artigo em Inglês | MEDLINE | ID: mdl-27663078

RESUMO

Levonorgestrel (LNG), a synthetic progestin, is used in emergency contraception (EC). The mechanism is preventing or delaying ovulation at the level of the hypothalamic pituitary unit; however, little knowledge exists on LNG effects at the ovary. The aim of this study was to identify the effects of LNG on FSH-induced 17ß-estradiol (E2) production, including LNG-mediated changes on global gene expression in rat granulosa cells (GC). Isolated GC from female Wistar rats were incubated in vitro in the presence or absence of human FSH and progestins. At the end of incubations, culture media and cells were collected for E2 and mRNA quantitation. The results showed the ability of LNG to inhibit both hFSH-induced E2 production and aromatase gene expression. Microarray analysis revealed that LNG treatment affects GC functionality particularly that related to folliculogenesis and steroid metabolism. These results may offer additional evidence for the mechanisms of action of LNG as EC.


Assuntos
Hormônio Foliculoestimulante/farmacologia , Perfilação da Expressão Gênica , Células da Granulosa/metabolismo , Levanogestrel/farmacologia , Organogênese/genética , Animais , Células Cultivadas , Regulação para Baixo/genética , Estradiol/biossíntese , Estrogênios/biossíntese , Feminino , Células da Granulosa/efeitos dos fármacos , Família Multigênica , Análise de Sequência com Séries de Oligonucleotídeos , Organogênese/efeitos dos fármacos , Progesterona/farmacologia , Ratos Wistar , Reação em Cadeia da Polimerase em Tempo Real , Reprodutibilidade dos Testes , Transdução de Sinais/efeitos dos fármacos , Transdução de Sinais/genética , Regulação para Cima/genética
10.
Mol Cell Endocrinol ; 447: 1-11, 2017 05 15.
Artigo em Inglês | MEDLINE | ID: mdl-28219738

RESUMO

The aim of this study was to analyze the effects of mid-cycle administration of Ulipristal acetate (UPA) on gene expression in endometrial biopsies taken during the receptive phase of the cycle. Fourteen healthy menstruating women were studied during 14 control non-treated and 12 treated cycles with a single dose of 30 mg UPA when follicle diameter reached 20 mm. Ovulation in both treated and control cycles was confirmed by serial determinations of serum LH, progesterone and vaginal ultrasound. An endometrial biopsy at day LH+7, in each cycle, was taken for RNA microarray and qPCR analysis or prepared for histological and immunohistochemistry studies. Functional analysis of differentially expressed genes showed the presence of changes compatible with a non-receptive endometrial phenotype, further confirmed by qPCR and immunohistochemistry. This study suggests the effects of UPA on endometrial receptivity, offering a plausible explanation for the higher contraceptive efficacy of this method compared to that of levonorgestrel.


Assuntos
Endométrio/metabolismo , Endométrio/patologia , Perfilação da Expressão Gênica , Ciclo Menstrual/genética , Norpregnadienos/administração & dosagem , Norpregnadienos/farmacologia , Análise por Conglomerados , Regulação para Baixo/efeitos dos fármacos , Regulação para Baixo/genética , Endométrio/efeitos dos fármacos , Feminino , Regulação da Expressão Gênica/efeitos dos fármacos , Ontologia Genética , Humanos , Ciclo Menstrual/efeitos dos fármacos , Reação em Cadeia da Polimerase em Tempo Real , Regulação para Cima/efeitos dos fármacos , Regulação para Cima/genética
11.
Contraception ; 71(6): 451-7, 2005 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-15914136

RESUMO

This study examined serum glycodelin concentrations and endometrial expression during the luteal phase following oral administration of levonorgestrel (LNG) at different stages of the ovarian cycle. Thirty women were recruited and allocated into three groups. All groups were studied during two consecutive cycles, a control cycle and the treatment cycle. In the treatment cycle, each woman received two doses of 0.75 mg LNG taken 12 h apart on days 3-4 before the luteinizing hormone (LH) surge (Group 1), at the time of LH rise (Group 2) and 48 h after the rise in LH was detected (Group 3). Serum progesterone (P) and glycodelin were measured daily during the luteal phase, and an endometrial biopsy was taken at day LH +9 for immunohistochemical glycodelin-A staining. In Group 1, serum P levels were significantly lower, serum glycodelin levels rose earlier and endometrial glycodelin-A expression was weaker than in Groups 2 and 3, in which no differences were found between control and treatment cycles. Levonorgestrel taken for emergency contraception (EC) prior to the LH surge alters the luteal phase secretory pattern of glycodelin in serum and endometrium. Based on the potent gamete adhesion inhibitory activity of glycodelin-A, the results may account for the action of LNG in EC in those women who take LNG before the LH surge.


Assuntos
Endométrio/efeitos dos fármacos , Fase Folicular/efeitos dos fármacos , Glicoproteínas/sangue , Levanogestrel/administração & dosagem , Fase Luteal/efeitos dos fármacos , Proteínas da Gravidez/sangue , Adulto , Anticoncepcionais Femininos/administração & dosagem , Anticoncepcionais Femininos/sangue , Anticoncepcionais Sintéticos Pós-Coito/administração & dosagem , Endométrio/fisiologia , Feminino , Glicodelina , Humanos , Progesterona/sangue
12.
Int J Biol Sci ; 11(8): 892-900, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26157344

RESUMO

Administration of the mineralocorticoid receptor antagonist spironolactone prevents the development of chronic kidney disease (CKD) after a severe ischemic injury. However, whether brief periods of ischemia lead to CKD and whether spironolactone administration after ischemia may be a useful therapeutic strategy to prevent the gradual deterioration of structure and function remains unexplored. Nineteen male Wistar rats were divided into four groups: rats that underwent renal bilateral ischemia for 10, 20, or 45 min were compared with sham operated rats. Additionally, thirteen male Wistar rats that underwent renal bilateral ischemia for 20 min were divided into an untreated ischemic group (I) and two groups receiving spironolactone, 20 mg/kg by gavage, at either 0 (Sp0) or 1.5-h after ischemia (Sp1.5). The rats were followed up and studied after 9 months. Mild (20 min) and severe (45 min) ischemia induced a progressive increase in proteinuria at varying magnitudes, whereas minor ischemia (10 min) did not modify proteinuria. CKD induced by moderate ischemia was characterized by renal hypertrophy and tubulointerstitial fibrosis. These effects were associated with activation of the transforming growth factor ß (TGFß) signaling pathway and up-regulation of endothelin receptor A (ETA) and alpha smooth muscle actin (αSMA). Spironolactone treatment immediately or 1.5-h after the ischemic insult prevented the onset of these disorders. Our results show that moderate ischemic insult leads to long-term structural and molecular changes that may compromise renal function in later stages. Additionally, we demonstrate that spironolactone administration after mild ischemia prevents this detrimental effect.


Assuntos
Isquemia/fisiopatologia , Rim/efeitos dos fármacos , Traumatismo por Reperfusão/prevenção & controle , Espironolactona/administração & dosagem , Animais , Rim/irrigação sanguínea , Rim/fisiopatologia , Masculino , Proteinúria/fisiopatologia , Ratos , Ratos Wistar , Traumatismo por Reperfusão/fisiopatologia
13.
Contraception ; 82(6): 526-33, 2010 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-21074015

RESUMO

BACKGROUND: The study was conducted to assess the effects of levonorgestrel (LNG) on hormonal behavior and on the secretory pattern of intrauterine glycodelin at the midcycle of ovulatory women. STUDY DESIGN: Thirty healthy sterilized women with normal ovarian function were studied during one control untreated cycle and one LNG-treated cycle. In the treated cycle, each woman received two doses of 0.75 mg of LNG 12 h apart during the preovulatory phase approximately 2 days before the LH surge. Daily follicle development recordings were performed until follicle rupture was observed, and serum glycodelin, LH, estradiol, estrone and progesterone were measured as well. In addition, glycodelin concentrations were assayed in uterine flushing obtained on Days LH+1 and LH+12. RESULTS: LNG did not modify follicle rupture in 20 of 30 women. In spite of ovulatory progesterone and the occurrence of follicle rupture in these women, luteal phase length was significantly decreased, as well as the serum concentrations of LH, estradiol and estrone in the periovulatory phase. Glycodelin in serum and uterine flushings was significantly elevated in the periovulatory phase when compared to control cycles. CONCLUSIONS: LNG taken at the dose used in emergency contraception before the LH surge increased prematurely serum and intrauterine concentrations of glycodelin at the time of ovulation. Since there are well established glycodelin inhibitory effects upon fertilization, these results may represent an additional action of LNG in situations where the intervention did not interfere with ovulation.


Assuntos
Anticoncepção Pós-Coito , Anticoncepcionais Femininos/farmacologia , Glicoproteínas/análise , Hormônios Esteroides Gonadais/sangue , Levanogestrel/farmacologia , Ciclo Menstrual/efeitos dos fármacos , Proteínas da Gravidez/análise , Útero/efeitos dos fármacos , Adulto , Endométrio/efeitos dos fármacos , Estradiol/sangue , Estrona/sangue , Feminino , Glicodelina , Glicoproteínas/sangue , Humanos , Fase Luteal/efeitos dos fármacos , Hormônio Luteinizante/sangue , Hormônio Luteinizante/urina , Folículo Ovariano/diagnóstico por imagem , Folículo Ovariano/efeitos dos fármacos , Ovulação/efeitos dos fármacos , Proteínas da Gravidez/sangue , Progesterona/sangue , Ultrassonografia , Útero/química , Útero/metabolismo , Adulto Jovem
14.
Salud pública Méx ; 51(3): 255-261, mayo-jun. 2009. graf, tab
Artigo em Espanhol | LILACS | ID: lil-625706

RESUMO

El mecanismo de acción del levonorgestrel (LNG) como anticonceptivo de emergencia (AE) es aún controvertido. Para quienes consideran que el embarazo inicia antes de la implantación, todo compuesto capaz de interferir con etapas posteriores a la fecundación y anteriores a la implantación se considera abortivo. Investigaciones previas sugieren que en seres humanos este método actúa también después de la fecundación. Sin embargo, en la actualidad existe sólida evidencia que demuestra que los efectos anteriores a la fecundación son en realidad los que explican la acción anticonceptiva del LNG. En este artículo se revisa la evidencia acumulada sobre los mecanismos de acción propuestos. Los consensos derivados de la información disponible establecen que los mecanismos prefecundación (inhibición o retardo de la ovulación) son los que explican la efectividad anticonceptiva de los AE de progestina sola.


There is still controversy regarding the mechanism of action of levonorgestrel (LNG) for emergency contraception (EC). For those who state that pregnancy starts prior to implantation, any compound able to interfere with post-fertilization and pre-implantation stages, should be considered as abortifacient. Previous research suggests that EC in humans acts predominantly after fertilization. Current evidence with LNG-only EC supports a pre-fertilization mechanisms to explain its action. There are many potential mechanisms of action, which could vary pending on the day during the fertilization window of the ovarian cycle at which the contraceptive is given. This paper reviews the evidence for each potential mechanism of action. According to the most recently statements, it is concluded that the primary and possible the only mechanism of action of LNG-only EC is preventing or delaying ovulation.


Assuntos
Animais , Feminino , Humanos , Anticoncepção Pós-Coito , Anticoncepcionais Pós-Coito/farmacologia , Modelos Animais
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