# | Title | Journal | Year | Citations |
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1 | Contraceptive failure in the United States | Contraception | 2011 | 1,184 |
2 | Unintended pregnancy in the United States: incidence and disparities, 2006 | Contraception | 2011 | 1,041 |
3 | A vaginal fluid simulant | Contraception | 1999 | 598 |
4 | Levonorgestrel-releasing and copper-releasing (Nova T) IUDs during five years of use: A randomized comparative trial | Contraception | 1994 | 471 |
5 | Pregnancy coercion, intimate partner violence and unintended pregnancy | Contraception | 2010 | 464 |
6 | 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 | Contraception | 2007 | 417 |
7 | On the history of hormonal contraception I. Ludwig Haberlandt (1885–1932) and his concept of “hormonal sterilization” | Contraception | 1970 | 390 |
8 | Estimates of contraceptive failure from the 2002 National Survey of Family Growth | Contraception | 2008 | 388 |
9 | On the history of hormonal contraception II. Otfried Otto Fellner (1873-19??) and estrogens as antifertility hormones | Contraception | 1971 | 384 |
10 | Contraceptive method use in the United States: trends and characteristics between 2008, 2012 and 2014 | Contraception | 2018 | 345 |
11 | Contraceptive failure in the United States | Contraception | 2004 | 338 |
12 | Radioimmunoassay of serum progesterone in women receiving oral contraceptive steroids | Contraception | 1972 | 334 |
13 | Unintended pregnancy and associated maternal preconception, prenatal and postpartum behaviors | Contraception | 2009 | 326 |
14 | Drospirenone: pharmacology and pharmacokinetics of a unique progestogen | Contraception | 2000 | 318 |
15 | Cardiovascular disease and use of oral and injectable progestogen-only contraceptives and combined injectable contraceptives | Contraception | 1998 | 295 |
16 | Likelihood of conception with a single act of intercourse: providing benchmark rates for assessment of post-coital contraceptives | Contraception | 2001 | 295 |
17 | Use and misuse of oral contraceptives: Risk indicators for poor pill taking and discontinuation | Contraception | 1995 | 294 |
18 | Oral contraceptives and venous thromboembolism: a five-year national case-control study☆ | Contraception | 2002 | 289 |
19 | Comparison of ethinylestradiol pharmacokinetics in three hormonal contraceptive formulations: the vaginal ring, the transdermal patch and an oral contraceptive | Contraception | 2005 | 287 |
20 | A prospective study of the effects of oral contraceptives on sexuality and well-being and their relationship to discontinuation | Contraception | 2001 | 281 |
21 | Can we identify women at risk of pregnancy despite using emergency contraception? Data from randomized trials of ulipristal acetate and levonorgestrel | Contraception | 2011 | 271 |
22 | Progesterone receptor blockage | Contraception | 1985 | 263 |
23 | Cost effectiveness of contraceptives in the United States | Contraception | 2009 | 258 |
24 | Age of sexual debut among US adolescents | Contraception | 2009 | 239 |
25 | Antioxidant superoxide dismutase - a review: its function, regulation in the testis, and role in male fertility | Contraception | 2002 | 238 |
26 | Abortion and long-term mental health outcomes: a systematic review of the evidence | Contraception | 2008 | 237 |
27 | Acceptance of long-acting reversible contraceptive methods by adolescent participants in the Contraceptive CHOICE Project | Contraception | 2011 | 237 |
28 | Consensus statement on the use of breastfeeding as a family planning method | Contraception | 1989 | 235 |
29 | A multicenter, randomized study of an extended cycle oral contraceptive | Contraception | 2003 | 234 |
30 | Plasma concentrations of free and non-TeBG bound testosterone in women on oral contraceptives | Contraception | 1974 | 226 |
31 | Prolonged intrauterine contraception: A seven-year randomized study of the levonorgestrel 20 mcg/day (LNg 20) and the Copper T380 Ag IUDS | Contraception | 1991 | 225 |
32 | Treatment of premenstrual dysphoric disorder with a new drospirenone-containing oral contraceptive formulation | Contraception | 2005 | 225 |
33 | Termination of very early pregnancy by RU 486 — An antiprogestational compound | Contraception | 1984 | 219 |
34 | The analysis of vaginal bleeding patterns induced by fertility regulating methods | Contraception | 1986 | 219 |
35 | Celebration meets caution: LARC's boons, potential busts, and the benefits of a reproductive justice approach | Contraception | 2014 | 219 |
36 | Women's preferences for contraceptive counseling and decision making | Contraception | 2013 | 217 |
37 | Bleeding patterns and clinical performance of the levonorgestrel-releasing intrauterine system (Mirena) up to two years | Contraception | 2002 | 215 |
38 | Oral contraceptives, cigarette smoking and other factors in relation to arthritis | Contraception | 1987 | 210 |
39 | Effect of four different oral contraceptives on various sex hormones and serum-binding globulins | Contraception | 2003 | 209 |
40 | Clinical performance of a levonorgestrel-releasing intrauterine system and oral contraceptives in young nulliparous women: a comparative study | Contraception | 2004 | 204 |
41 | Safety and efficacy of Implanon™, a single-rod implantable contraceptive containing etonogestrel | Contraception | 2005 | 204 |
42 | Timing of steps and reasons for delays in obtaining abortions in the United States | Contraception | 2006 | 202 |
43 | Intrauterine device insertion during the postpartum period: a systematic review | Contraception | 2009 | 196 |
44 | The increased risk of venous thromboembolism and the use of third generation progestagens: Role of bias in observational research | Contraception | 1996 | 194 |
45 | First-time use of newer oral contraceptives and the risk of venous thromboembolism | Contraception | 1997 | 192 |
46 | “It just happens”: a qualitative study exploring low-income women’s perspectives on pregnancy intention and planning | Contraception | 2015 | 190 |
47 | Unintended pregnancy in sub-Saharan Africa: magnitude of the problem and potential role of contraceptive implants to alleviate it | Contraception | 2008 | 189 |
48 | Burden of unintended pregnancy in the United States: potential savings with increased use of long-acting reversible contraception | Contraception | 2013 | 188 |
49 | Gossypol: a contraceptive for men | Contraception | 2002 | 184 |
50 | Copper-T intrauterine device and levonorgestrel intrauterine system: biological bases of their mechanism of action | Contraception | 2007 | 184 |