References
- Cheng L, Che Y, Gülmezoglu AM. Interventions for emergency contraception. Cochrane Database Syst Rev 2012;15:CD001324
- Ho PC, Kwan MS. A prospective randomized comparison of levonorgestrel with the Yuzpe regimen in postcoital contraception. Hum Reprod 1993;8:389-92
- Task Force on Postovulatory Methods of Fertility Regulation. Randomized controlled trial of levonorgestrel versus the Yuzpe regimen of combined oral contraceptives for emergency contraception. Lancet 1998;352:428-33
- von Hertzen H, Piaggio G, Ding J, et al. WHO Research Group on Postovulatory Methods of Fertility Regulation. Low dose mifepristone and two regimens of levonorgestrel for emergency contraception: a WHO multicentre randomized trial. Lancet 2002;360:1803-10
- Dada OA, Godfrey EM, Piaggio G, von Hertzen H. A randomized, double-blind, noninferiority study to compare two regimens of levonorgestrel for emergency contraception in Nigeria. Contraception 2010;82:373-8
- Croxatto HB, Brache V, Pavez M, et al. Pituitary–ovarian function following the standard levonorgestrel emergency contraceptive dose or a single 0.75 mg dose given on the days preceding ovulation. Contraception 2004;70:442-50
- Marions L, Hultenby K, Lindell I, et al. Emergency contraception with levonorgestrel and mifepristone: mechanism of action. Obstet Gynecol 2002;100:65-71
- Lalitkumar PG, Lalitkumar S, Meng CX, et al. Mifepristone but not levonorgestrel inhibits human blastocyst attachment to an in vitro endometrial three-dimensional cell culture model. Hum Reprod 2007;22:3031-7
- Creinin MD, Schlaff W, Archer DF, et al. Progesterone receptor modulator for emergency contraception: a randomized controlled trial. Obstet Gynecol 2006;108:1089-97
- EMA Assessment Report, EMA/464144/2014, 24 July 2014. Available at: http://www.ema.europa.eu/docs/en_GB/document_library/EPAR_-_Assessment_Report_-_Variation/human/001027/WC500176357.pdf [Last accessed 24 March 2015]
- Glasier AF, Cameron ST, Blithe D, et al. Can we identify women at risk of pregnancy despite using emergency contraception? Data from randomized trials of ulipristal acetate and levonorgestrel. Contraception 2011;84:363-7
- Glasier AF, Cameron ST, Fine PM, et al. Ulipristal acetate versus levonorgestrel for emergency contraception: a randomized noninferiority trial and meta-analysis. Lancet 2010;375:555-62
- Trussell J, Ellertson C, von Hertzen H, et al. Estimating the effectiveness of emergency contraceptive pills. Contraception 2003;67:259-65
- Lopez LM, Grimes DA, Chen M, et al. Hormonal contraceptives for contraception in overweight or obese women. Cochrane Database Syst Rev 2013;4:CD008452
- EMA Press Release 21 November, 2015. EMA recommends availability of ellaOne emergency contraceptive without prescription. Available at: http://www.ema.europa.eu/ema/index.jsp?curl=pages/news_and_events/news/2014/11/news_detail_002223.jsp&mid=WC0b01ac058004d5c1 [Last accessed 24 March 2015]