REFERENCES
- Cheng L, Gülmezoglu AM, Piaggio G, . Interventions for emergency contraception. Cochrane Database Syst Rev 2008;(2):CD001324.
- Trussell J, Ellertson C, Stewart F, . The role of emergency contraception. Am J Obstet Gynecol 2004; 190:S30–8.
- UNDP, UNFPA, WHO, World Bank Special Programme of Research, Development and Research Training in Human Repoduction (HRP). Fact sheet on the safety of levonorgestrel-alone emergency contraceptive pills (LNG ECPs). Geneva: World Health Organisation 2010. Accessed January 2012 from: http://www.who.int/reproductivehealth/publications/family_planning/HRP_RHR_10_06
- Faculty of Sexual and Reproductive Healthcare, Clinical Effectiveness Unit. Emergency contraception. 2011. Accessed January 2012 from: http://www.fsrh.org/pdfs/CEUguidanceEmergencyContraception11.pdf.
- Piaggio G, Kapp N, von Hertzen H. Effect on pregnancy rates of the delay in the administration of levonorgestrel for emergency contraception: A combined analysis of four WHO trials. Contraception 2011; 84:35–9.
- Aneblom G, Larsson M, von Essen L, Tydén T. Women's voices about emergency contraceptive pills ‘over- the-counter’: A Swedish perspective. Contraception 2002; 66:339–43.
- Checa MA, Pascual J, Robles A, Carreras R. Trends in the use of emergency contraception: An epidemiological study in Barcelona, Spain (1994 - 2002). Contraception 2004;70:199–201.
- Vergara Cano JC, López-Guerrero Almansa A, López López F. Anticoncepción de emergencia: Perfil de la usuaria en servicios de urgencias de atención primaria. Aten Primaria 2004;34:279–82.
- Olszewski J, Olszewska H, Abacjew A, . The use of emergency contraception in young Polish women. Acta Obstet Gynecol Scand 2007;86:861–9.
- Gbolade BA, Elstein M, Yates D. UK accident and emergency departments and emergency contraception: What do they think and do? J Accid Emerg Med 1999; 16:35–8.
- Rosenberg KD, Demunter JK, Liu J. Emergency contraception in emergency departments in Oregon, 2003. Am J Public Health 2005;95:1453–7.
- Harrison T. Availability of emergency contraception: A survey of hospital emergency department staff. Ann Emerg Med 2005;46:105–10.
- Bo M, Casagranda I, Galzerano M, . Emergency contraception: a survey of hospital emergency departments’ staff. Emerg Care J 2011;7:10–5.
- Golden NH, Seigel WM, Fisher M, . Emergency contraception: pediatricians’ knowledge, attitudes, and opinions. Pediatrics 2001;107:287–92.
- Espey E, Ogburn T, Leeman L, . Compliance with mandated emergency contraception in New Mexico emergency departments. J Womens’ Health (Larchmt) 2009;18:619–23.
- Croxatto HB, Devoto L, Durand M, . Mechanism of action of hormonal preparations used for emergency contraception: A review of the literature. Contraception 2001;63:111–21.
- Gemzell-Danielsson K, Marions L. Mechanisms of action of mifepristone and levonorgestrel when used for emergency contraception. Hum Reprod Update 2004;10:341–8.
- Novikova N, Weisberg E, Stanczyk FZ, . Effectiveness of levonorgestrel emergency contraception given before or after ovulation – A pilot study. Contraception 2007;75:112–8.
- Lalitkumar PG, Lalitkumar S, Meng CX, . Mifepristone, but not levonorgestrel, inhibits human blastocyst attachment to an in vitro endometrial three-dimensional cell culture model. Hum Reprod 2007; 22:3031–7.
- Card RF. Conscientious objection and emergency contraception. Am J Bioeth 2007;7:8–14.