Title	Publication Date	Language	Citations
Contraceptive failure in the United States	2011/05/01	English	906
Unintended pregnancy in the United States: incidence and disparities, 2006	2011/11/01	English	865
Pregnancy coercion, intimate partner violence and unintended pregnancy	2010/04/01	English	403
Levonorgestrel-releasing and copper-releasing (Nova T) IUDs during five years of use: A randomized comparative trial	1994/01/01	English	327
Contraceptive method use in the United States: trends and characteristics between 2008, 2012 and 2014	2018/01/01	English	315
Unintended pregnancy and associated maternal preconception, prenatal and postpartum behaviors	2009/03/01	English	288
Estimates of contraceptive failure from the 2002 National Survey of Family Growth	2008/01/01	English	267
The safety of a drospirenone-containing oral contraceptive: final results from the European Active Surveillance study on Oral Contraceptives based on 142,475 women-years of observation	2007/05/01	English	256
Contraceptive failure in the United States	2004/08/01	English	233
Cost effectiveness of contraceptives in the United States	2009/01/01	English	223
Comparison of ethinylestradiol pharmacokinetics in three hormonal contraceptive formulations: the vaginal ring, the transdermal patch and an oral contraceptive	2005/09/01	English	210
Can we identify women at risk of pregnancy despite using emergency contraception? Data from randomized trials of ulipristal acetate and levonorgestrel	2011/10/01	English	207
Radioimmunoassay of serum progesterone in women receiving oral contraceptive steroids	1972/02/01	English	206
Acceptance of long-acting reversible contraceptive methods by adolescent participants in the Contraceptive CHOICE Project	2011/11/01	English	198
Women's preferences for contraceptive counseling and decision making	2013/08/01	English	194
Timing of steps and reasons for delays in obtaining abortions in the United States	2006/10/01	English	185
Abortion and long-term mental health outcomes: a systematic review of the evidence	2008/12/01	English	183
Progesterone receptor blockage	1985/07/01	English	182
“It just happens”: a qualitative study exploring low-income women’s perspectives on pregnancy intention and planning	2015/02/01	English	179
The analysis of vaginal bleeding patterns induced by fertility regulating methods	1986/09/01	English	172
Burden of unintended pregnancy in the United States: potential savings with increased use of long-acting reversible contraception	2013/02/01	English	166
Clinical performance of a levonorgestrel-releasing intrauterine system and oral contraceptives in young nulliparous women: a comparative study	2004/05/01	English	164
Treatment of premenstrual dysphoric disorder with a new drospirenone-containing oral contraceptive formulation	2005/12/01	English	162
Unintended pregnancy in sub-Saharan Africa: magnitude of the problem and potential role of contraceptive implants to alleviate it	2008/07/01	English	161
Celebration meets caution: LARC's boons, potential busts, and the benefits of a reproductive justice approach	2014/04/01	English	159
A family planning clinic partner violence intervention to reduce risk associated with reproductive coercion	2011/03/01	English	157
Age of sexual debut among US adolescents	2009/08/01	English	154
Consensus statement on the use of breastfeeding as a family planning method	1989/05/01	English	150
Recent reproductive coercion and unintended pregnancy among female family planning clients	2014/02/01	English	149
Termination of very early pregnancy by RU 486 — An antiprogestational compound	1984/05/01	English	147