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1.
West J Emerg Med ; 25(2): 291-300, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38596932

RESUMO

Background: Despite the prevalence of sexual assault presentations to emergency departments (ED) in the United States, current access to sexual assault nurse examiners (SANE) and emergency contraception (EC) in EDs is unknown. Methods: In this study we employed a "secret shopper," cross-sectional telephonic survey. A team attempted phone contact with a representative sample of EDs and asked respondents about the availability of SANEs and EC in their ED. Reported availability was correlated with variables including region, urban/rural status, hospital size, faith affiliation, academic affiliation, and existence of legislative requirements to offer EC. Results: Over a two-month period in 2019, 1,046 calls to hospitals were attempted and 960 were completed (91.7% response rate). Of the 4,360 eligible hospitals listed in a federal database, 960 (22.0%) were contacted. Access to SANEs and EC were reported to be available in 48.9% (95% confidence interval [CI] 45.5-52.0) and 42.5% (95% CI 39.4-45.7) of hospitals, respectively. Access to EC was positively correlated with SANE availability. The EDs reporting SANE and EC availability were more likely to be large, rural, and affiliated with an academic institution. Those reporting access to EC were more likely to be in the Northeast and in states with legislative requirements to offer EC. Conclusion: Our results suggest that perceived access to sexual assault services and emergency contraception in EDs in the United States remains poor with regional and legislative disparities. Results suggest disparities in perceived access to EC and SANE in the ED, which have implications for improving ED practices regarding care of sexual assault victims.


Assuntos
Anticoncepção Pós-Coito , Delitos Sexuais , Humanos , Estados Unidos , Estudos Transversais , Serviço Hospitalar de Emergência , Inquéritos e Questionários
2.
Stud Fam Plann ; 55(1): 61-69, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38483790

RESUMO

According to the WHO, all clients should have access to a range of contraceptive methods, including at least one short-term, one long-term, one permanent, and one emergency method of contraception. While there are data on the contraceptive method mix available for many low- and middle-income countries, there are limited data on emergency contraception (EC). This is likely due to some surveys not routinely collecting this information, how survey questions are asked, dual method use, and/or low levels of reported use of EC pill (ECP). Even with low reported use in surveys, contraceptive social marketing statistics from DKT International. show a trend in recent years of increasing product sales of ECPs. To understand a more complete scope of ECP use, we use Pakistan as a case study and analyze Pakistan's Demographic Health Survey (DHS) surveys and Pakistan's Contraceptives Logistics Management Systems. Based on commodities dispensed data for ECPs in 2021, about 0.4 percent of all married women in Pakistan use ECPs. While there is currently a small proportion of women, it is growing and the use of ECPs is not zero as indicated by the DHS. Therefore, where available, countries should review their health management information systems data alongside survey data for ECP use.


Assuntos
Anticoncepção Pós-Coito , Anticoncepcionais Pós-Coito , Sistemas de Informação Administrativa , Feminino , Humanos , Anticoncepcionais Pós-Coito/uso terapêutico , Paquistão , Anticoncepção , Anticoncepcionais
3.
FP Essent ; 538: 25-29, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38498326

RESUMO

Long-acting reversible contraceptives (LARCs) include progestin and copper intrauterine devices (IUDs) and progestin subdermal implants. LARCs may be the preferred for individuals who want a method that is highly effective and can last for several years, or for whom estrogen is contraindicated. LARCs should be offered using a shared decision-making approach, keeping in mind that historically these methods have been used coercively to control the reproductive choices of marginalized or disabled people. To ensure safe prescribing and reduce barriers to receiving LARCs, family physicians should be familiar with two evidence-based national contraceptive guidelines: the U.S. Medical Eligibility Criteria for Contraceptive Use (U.S. MEC) and the U.S. Selected Practice Recommendations for Contraceptive Use (U.S. SPR). Information about insertion, removal, potential complications, and expected adverse effects should be included when counseling patients about LARC options. Both types of LARC IUDs can safely be used for emergency contraception if inserted within 5 days of unprotected intercourse. Several oral emergency contraception drug options also are available.


Assuntos
Anticoncepção Pós-Coito , Dispositivos Intrauterinos , Feminino , Humanos , Progestinas , Anticoncepcionais Orais , Anticoncepção
4.
Soc Sci Med ; 344: 116635, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38324975

RESUMO

Emergency contraceptive pills are an essential and unique post-coital method to avoid a pregnancy, with evidence showing the significant role men can have in procurement and decisions to use. Global Health recommendations specify that emergency contraceptive pills be used sparingly and under specific conditions. This increasingly misaligns with the myriad conceptualisations and rationales among the public for why they choose to use emergency contraceptive pills. There has been a paucity of research aiming to understanding men's involvement and how they shape women's access, choice, and autonomy. This study interrogates how emergency contraceptive pills are conceptualised by men in James Town, Ghana, and how this intersects with their motivations to be involved in its use. Mixed method data from a survey (n = 270) and in-depth interviews (n = 37) were collected between July 2020 and January 2021. The analysis examines men's framings of emergency contraceptive pills and how these shape their involvement in its use. Men's knowledge of post-coital contraceptives was high, while knowledge of the specific term 'emergency contraception' was lower. While some men understood the pills in ways that aligned to Global Health framings, many more men saw emergency contraceptive pills as another means of pregnancy prevention in line with other contraceptives. This included its conceptualisation as a contraceptive that facilitates pleasurable (condomless) and spontaneous sex. Gendered perceptions of women who use emergency contraceptive pills were bound in sexual stigma, and men indicated that emergency contraceptive pills were a directly observable form of contraception that they could pressure their partner into using. Understanding plural conceptualisations away from 'emergency' are necessary to create policies and programmes that account for men's involvement. This includes understanding how emergency contraceptive pills are located within people's sexual and reproductive lives and gendered power dynamics, to reflect the public's own rationales for and experiences using post-coital contraceptives.


Assuntos
Anticoncepção Pós-Coito , Anticoncepcionais Pós-Coito , Masculino , Gravidez , Humanos , Feminino , Anticoncepcionais Pós-Coito/uso terapêutico , Gana , Formação de Conceito , Inquéritos e Questionários
5.
Drug Ther Bull ; 62(3): 38, 2024 Feb 28.
Artigo em Inglês | MEDLINE | ID: mdl-38326010

RESUMO

Overview of: Li RHW, Lo SST, Gemzell-Danielsson K, et al. Oral emergency contraception with levonorgestrel plus piroxicam: a randomised double-blind placebo-controlled trial [correction appears in Lancet 2023;402:850]. Lancet 2023;402:851-8.


Assuntos
Anticoncepção Pós-Coito , Humanos , Levanogestrel/uso terapêutico , Levanogestrel/farmacologia , Piroxicam , Método Duplo-Cego
6.
JAMA Netw Open ; 7(1): e2353672, 2024 Jan 02.
Artigo em Inglês | MEDLINE | ID: mdl-38277150

RESUMO

This cross-sectional study of female emergency contraception users examines emergency contraception­related emergency department use disparities and associations with policy changes.


Assuntos
Anticoncepção Pós-Coito , Humanos , Serviço Hospitalar de Emergência , Inquéritos e Questionários
7.
Contraception ; 132: 110370, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38232940

RESUMO

OBJECTIVE: To estimate the incidence of ovulation suppression within five days of etonogestrel 68 mg implant insertion in the presence of a dominant follicle with and without same-day ulipristal acetate. STUDY DESIGN: This single site non-masked, exploratory randomized trial recruited people age 18-35 years with regular menstrual cycles, no pregnancy risk, and confirmed ovulatory function. We initiated transvaginal ultrasound examinations on menstrual day 7-9 and randomized participants 1:1 to etonogestrel implant alone or with concomitant ulipristal acetate 30 mg oral when a dominant follicle reached ≥14 mm in diameter. We completed daily sonography and serum hormone levels for up to seven days or transitioned to labs alone if sonographic follicular rupture occurred. We defined ovulation as follicular rupture followed by progesterone >3 ng/mL. We calculated point estimates, risk ratios and 95% confidence intervals for ovulation for each group. Ovulation suppression of ≥44% in either group (the follicular rupture suppression rate with oral levonorgestrel emergency contraception), would prompt future method testing. RESULTS: From October 2020 to October 2022, we enrolled 40 people and 39 completed primary outcome assessments: 20 with etonogestrel implant alone (mean follicular size at randomization: 15.2 mm ± 0.9 mm) and 19 with etonogestrel implant + ulipristal acetate (mean follicular size at randomization: 15.4 mm ± 1.2 mm, p = 0.6). Ovulation suppression occurred in 13 (65%) of etonogestrel implant-alone participants (Risk ratio 0.6 (95% CI: 0.3, 1.1), p = 0.08) and seven (37%) of implant + ulipristal acetate participants. CONCLUSIONS: Ovulation suppression of the etonogestrel implant alone exceeds threshold testing for future research while the implant + ulipristal acetate does not. IMPLICATIONS: Data are lacking on midcycle ovulation suppression for the etonogestrel implant with and without oral ulipristal acetate. In this exploratory study, ovulation suppression occurred in 65% of implant participants and 37% of implant + ulipristal acetate participants. Ovulation suppression of the implant alone exceeds threshold testing for future emergency contraception research.


Assuntos
Anticoncepção Pós-Coito , Anticoncepcionais Femininos , Norpregnadienos , Feminino , Humanos , Adolescente , Adulto Jovem , Adulto , Desogestrel , Anticoncepcionais Femininos/farmacologia , Anticoncepção Pós-Coito/métodos
8.
Obstet Gynecol ; 143(2): 189-194, 2024 Feb 01.
Artigo em Inglês | MEDLINE | ID: mdl-37989139

RESUMO

Emergency contraception methods that also deliver ongoing contraception provide the most effective options for individuals hoping to prevent pregnancy after unprotected intercourse. Although the copper intrauterine device (IUD) provides the most effective option for emergency contraception because the device prevents pregnancy when placed before implantation and offers long-acting contraception, uptake by patients has been limited. Recently, the Society of Family Planning issued new guidance recommending the levonorgestrel IUD (LNG-IUD) as an emergency contraception option along with the copper IUD. Here, we review evidence related to this recommendation and conclude that the available data do not support use of the LNG-IUD for emergency contraception. We discuss the mechanisms of action of emergency contraception methods and how these concepts interface with the current political and social landscape of contraception and abortion care. We describe limitations of the existing evidence supporting use of the LNG-IUD as emergency contraception and highlight the critical research needed to establish the device as a highly effective method of emergency contraception.


Assuntos
Anticoncepção Pós-Coito , Dispositivos Intrauterinos de Cobre , Dispositivos Intrauterinos , Gravidez , Feminino , Humanos , Levanogestrel
9.
Contraception ; 131: 110344, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38008305

RESUMO

OBJECTIVE: To determine a 1-month pregnancy rate point estimate and 95% confidence interval for guideline-supported, same-day initiation of an etonogestrel implant plus oral levonorgestrel emergency contraception. STUDY DESIGN: In this single-arm, prospective observational study, all emergency contraception clients who presented to four Planned Parenthood Association of Utah clinics from February 2021 to March 2023 received information about oral levonorgestrel with same-day etonogestrel implant insertion. Participants were ≤35 years and reported unprotected intercourse within 5 days with negative pregnancy testing. The primary outcome measure was a 1-month home pregnancy test. We calculated the efficacy using a test of proportions with Yates continuity correction. RESULTS: A total of 160 emergency contraception clients (7.6% of 2106 approached) enrolled and 153 had 1-month pregnancy outcomes. A positive pregnancy test occurred in 2 participants resulting in an overall pregnancy rate of 1.32% (95% confidence interval 0.23%-5.19%). Ultrasound gestational dating assigned conception of the first pregnancy to 8 days before enrollment. For the second pregnancy, ultrasound dating designated conception at 5 days prior to enrollment. Limiting the efficacy rate to the single pregnancy that occurred within 5 days of unprotected intercourse, we report a pregnancy rate of 0.66% (95% confidence interval 0.03%-4.19%). CONCLUSIONS: In this observational study of emergency contraception clients selecting oral levonorgestrel with same-day etonogestrel implant, we identified a pregnancy rate within the established range of oral emergency contraception methods alone. IMPLICATIONS: Clients presenting for emergency contraception may also desire ongoing highly-effective contraception, yet current clinical guidelines serve as a barrier to same-day method initiation for the etonogestrel implant and other hormonal methods. Improving access to contraceptive method initiation will reduce the ongoing risk of unwanted pregnancy for this population. CLINICAL TRIAL REGISTRATION: Clinicaltrials.gov NCT04678817; registered 12/16/20.


Assuntos
Anticoncepção Pós-Coito , Anticoncepcionais Femininos , Feminino , Humanos , Gravidez , Anticoncepção Pós-Coito/métodos , Desogestrel , Levanogestrel , Adulto
10.
Womens Health Issues ; 34(1): 66-71, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-37563061

RESUMO

INTRODUCTION: Despite the high potential need for emergency contraception (EC) among college students, lack of accurate knowledge may decrease the likelihood of its use in this population. We examined knowledge about EC methods, potential outcomes of use, and access among college students in the United States. METHODS: We recruited college students from a listserv devoted to EC campus activism for an online survey about EC knowledge (N = 150) and conducted 24 follow-up in-depth interviews. We describe the share of respondents that correctly answered each question and provide additional context and insight from interview respondents. RESULTS: Gaps in EC knowledge were noted in our sample of college student EC activists. Awareness of different methods of EC was not universal; 38% of the sample was unaware of ulipristal acetate (ella®) and 61% was unaware of the intrauterine device inserted after intercourse as EC. Many respondents also incorrectly perceived additional barriers to acquiring EC such as minimum age or an ID requirement to purchase EC (64% and 49%, respectively). Interview respondents describe how medical providers, such as student health services and pharmacists, can pose barriers to EC access through either their actions or how college students expect they will act. CONCLUSIONS: We document several gaps in knowledge surrounding EC in college students, even in an activist sample. Additional efforts to inform students about the variety of available EC methods and address mistaken perceptions about barriers to access may allow college students to better meet their needs for EC.


Assuntos
Anticoncepção Pós-Coito , Dispositivos Intrauterinos , Feminino , Humanos , Amigos , Conhecimentos, Atitudes e Prática em Saúde , Estudantes , Inquéritos e Questionários , Universidades
11.
Contraception ; 132: 110361, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38160962

RESUMO

BACKGROUND: Alabama's Human Life Protection Act (the Act) signed in 2019 became law in 2022, making provision of abortion a felony offense. OBJECTIVE: In 2020, we assessed the accessibility of emergency contraception (EC) pills in Birmingham, Alabama prior to the Act's enactment given the probable increased need for EC access due to abortion criminalization. STUDY DESIGN: Pharmacy staff were asked about availability, price, location, and identification requirements to obtain EC. RESULTS: Of 69 pharmacies, 59% had levonorgestrel EC and none had ulipristal acetate EC available. CONCLUSION: There are persistent barriers to EC accessibility that should be addressed as abortion is increasingly restricted.


Assuntos
Aborto Induzido , Anticoncepção Pós-Coito , Feminino , Gravidez , Humanos , Alabama , Anticoncepcionais Orais , Levanogestrel
13.
Ann Intern Med ; 176(12): JC140, 2023 12.
Artigo em Inglês | MEDLINE | ID: mdl-38048581

RESUMO

SOURCE CITATION: Li RHW, Lo SST, Gemzell-Danielsson K, et al. Oral emergency contraception with levonorgestrel plus piroxicam: a randomised double-blind placebo-controlled trial. Lancet. 2023;402:851-858. 37597523.


Assuntos
Anticoncepção Pós-Coito , Levanogestrel , Humanos , Piroxicam , Método Duplo-Cego , Etnicidade
14.
BMJ ; 383: e077437, 2023 12 20.
Artigo em Inglês | MEDLINE | ID: mdl-38123174

RESUMO

OBJECTIVE: To estimate the increase in sales of emergency contraception following the New Year's Eve/New Year's Day holiday. DESIGN: Time series analysis using autoregressive integrated moving average (ARIMA) model. SETTING: Traditional (that is, "bricks and mortar") retail outlets-grocery stores, drug stores, mass merchandisers, club stores, dollar stores, and military outlets-in the United States from 2016 to 2022. DATA SOURCE: Marketing data on weekly aggregated sales of items classified as emergency contraception gathered between 2016 and 2022 (n=362). On the basis of dates, weeks were classified as following the New Year holiday (n=6) or not (n=356). MAIN OUTCOME MEASURE: Weekly sales of levonorgestrel emergency contraception per 1000 women of reproductive age in the US population. RESULTS: Sales of levonorgestrel emergency contraception significantly increased after the New Year holiday (0.63 (95% confidence interval 0.58 to 0.69) unit increase per 1000 women aged 15-44). Holidays that share some aspects of the elevated risks of unprotected sexual intercourse with the New Year holiday (Valentine's Day, St Patrick's Day, US Independence Day) were associated with increased sales, albeit to a lesser degree, with respective sales increases per 1000 women aged 15-44 of 0.31 (0.25 to 0.38), 0.14 (0.06 to 0.23), and 0.20 (0.11 to 0.29). Holidays without these expectations (Easter, Mother's Day, Father's Day) were not significantly associated with sales of levonorgestrel emergency contraception. CONCLUSIONS: Increased sales of emergency contraception following the New Year's holiday suggest that this period is associated with increased risks of unprotected vaginal intercourse compared with other holidays. Targeting behavioral risks, prevention strategies to mitigate sexual violence, and improving access to contraception around holidays may limit the risks associated with unprotected vaginal intercourse.


Assuntos
Anticoncepção Pós-Coito , Humanos , Estados Unidos/epidemiologia , Feminino , Levanogestrel/uso terapêutico , Férias e Feriados , Fatores de Tempo , Marketing
15.
Orv Hetil ; 164(44): 1736-1748, 2023 Nov 05.
Artigo em Húngaro | MEDLINE | ID: mdl-37930357

RESUMO

INTRODUCTION: Emergency contraception is an effective and safe solution for preventing unwanted pregnancies. Many methods of emergency contraception are used, which have different mechanisms of action and time frames. OBJECTIVE: Providing information to healthcare professionals and decision-makers based on the literature data about the target populations of emergency contraception, evidence-based modern methods, their effectiveness, and practical application for the purpose of reducing the incidence of unintended pregnancies. METHODS: We conducted a systematic literature search in MEDLINE (PubMed), Embase and Scopus databases based on relevant keywords, for publications that were published between 1960 and 2023. RESULTS: 23 clinical professional publications were selected that examined the effectiveness of oral and long-term usable contraceptives as emergency contraceptives. Our research results were interpreted in terms of weight, breastfeeding, time elapsed since the intercourse and future contraceptive plans, which help to select the most appropriate emergency contraceptive for healthcare professionals. CONCLUSION: Based on the literature data, our systematic review provides assistance for choosing between the available oral levonorgestrel, ulipristal acetate, and intrauterine contraceptive devices available in Hungary based on effectiveness, target population, and accessibility. We support the healthcare governance in creating up-to-date professional guidelines to improve the availability of emergency contraception and, consequently, enhance reproductive health. Orv Hetil. 2023; 164(44): 1736-1748.


Assuntos
Anticoncepção Pós-Coito , Feminino , Gravidez , Humanos , Bases de Dados Factuais , Pessoal de Saúde , Hungria
16.
Eur J Obstet Gynecol Reprod Biol ; 291: 213-218, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37922775

RESUMO

Emergency contraception (EC), or postcoital contraception, is a therapy aimed at preventing unintended pregnancy after an act of unprotected or under-protected sexual intercourse. Options include both emergency contraceptive pills (most commonly containing levonorgestrel or ulipristal acetate) and insertion of an intrauterine device. The aim of this paper is to summarize current evidence surrounding the use of emergency contraceptives and to present an evidence-based approach to EC provision. Emergency contraception is a safe and effective option in preventing unwanted pregnancy, irrespective of age, weight, or breastfeeding status. Efforts should be made to increase their availability, as well as knowledge of these methods, both among patients and healthcare providers.


Assuntos
Anticoncepção Pós-Coito , Anticoncepcionais Pós-Coito , Dispositivos Intrauterinos , Norpregnadienos , Gravidez , Feminino , Humanos , Levanogestrel/uso terapêutico , Anticoncepcionais Pós-Coito/uso terapêutico , Gravidez não Planejada , Norpregnadienos/uso terapêutico , Anticoncepção
17.
J Forensic Nurs ; 19(3): 150-159, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37590937

RESUMO

BACKGROUND: An estimated 25,000 pregnancies result from sexual assault in the United States annually. Numerous professional healthcare organizations endorse offering emergency contraception (EC) as an integrated aspect of post-sexual-assault care. Lack of knowledge surrounding EC's mechanism of action, including misinterpreting ECs as abortifacients, might restrict patient access to this important healthcare option. PURPOSE: We evaluated sexual assault nurse examiners' understanding of the mechanism of action of oral ECs levonorgestrel (LNG) and ulipristal acetate (UPA). METHODS: A cross-sectional survey of practicing sexual assault nurse examiners was conducted through the International Association of Forensic Nurses. RESULTS: Among 173 respondents, 96.53% reported they prescribed/dispensed EC at the time of medical forensic examinations. LNG was prescribed more frequently than UPA (57.80% vs. 38.2%, respectively). When asked if they agreed or disagreed if LNG and UPA can disrupt an established pregnancy, 83.2% selected disagree/strongly disagree for LNG versus 78.6% for UPA, which were not significantly different. When asked whether the Supreme Court ruling overturning Roe v. Wade would change their EC prescribing, 79.77% reported it will have no change, 6.94% said it would increase, and 12.72% reported they were unsure. Several commented they were concerned whether state laws would prohibit EC and at least one program stopped prescribing EC because of their state laws. IMPLICATIONS: Addressing misinformation regarding EC's mechanism of action and increasing access to oral EC options after sexual assault have the potential to reduce the incidence of rape-related pregnancy.


Assuntos
Anticoncepção Pós-Coito , Gravidez , Feminino , Humanos , Estados Unidos , Estudos Transversais , Levanogestrel , Medicina Legal
19.
Lancet ; 402(10405): 851-858, 2023 09 09.
Artigo em Inglês | MEDLINE | ID: mdl-37597523

RESUMO

BACKGROUND: Levonorgestrel, a standard drug for emergency contraception (EC), is not effective if administered post-ovulation. A cyclo-oxygenase inhibitor could contribute synergistic effects. We investigated whether a single 40 mg oral dose of piroxicam as co-treatment with levonorgestrel improved emergency contraceptive efficacy. METHODS: This was a randomised double-blind placebo-controlled trial carried out in a major community sexual and reproductive health service in Hong Kong. Women who required levonorgestrel EC within 72 h of unprotected sexual intercourse were recruited and block-randomised in a 1:1 ratio to receive a single supervised dose of levonorgestrel 1·5 mg plus either piroxicam 40 mg or placebo orally. Group assignment was concealed in opaque envelopes and masked to the women, clinicians, and investigators. At follow-up 1-2 weeks after the next expected period, the pregnancy status was noted by history or pregnancy test. The primary efficacy outcome was the proportion of pregnancies prevented out of those expected based on an established model. All women randomised to receive the study drug and who completed the follow-up were analysed. The trial was registered with ClinicalTrials.gov, NCT03614494. FINDINGS: 860 women (430 in each group) were recruited between Aug 20, 2018, and Aug 30, 2022. One (0·2%) of 418 efficacy-eligible women in the piroxicam group were pregnant, compared with seven (1·7%) of 418 in the placebo group (odds ratio 0·20 [95% CI 0·02-0·91]; p=0·036). Levonorgestrel plus piroxicam prevented 94·7% of expected pregnancies compared with 63·4% for levonorgestrel plus placebo. We noted no significant difference between the two groups in the proportion of women with advancement or delay of their next period, or in the adverse event profile. INTERPRETATION: Oral piroxicam 40 mg co-administered with levonorgestrel improved efficacy of EC in our study. Piroxicam co-administration could be considered clinically where levonorgestrel EC is the option of choice. FUNDING: None.


Assuntos
Anticoncepção Pós-Coito , Anticoncepcionais Pós-Coito , Feminino , Gravidez , Humanos , Piroxicam , Levanogestrel , Inibidores de Ciclo-Oxigenase
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