Emergency contraception: A review

References

• World Health Organization. Levonorgestrel for emergency contraception, WHO/RHR/Fact Sheet. WHO, Geneva October, 2005, Available at: www.who.int/reproductive-health/family_planning/ec.html (last accessed October 2007)
   Google Scholar
• World Health Organization. Emergency Contraception: A guide for service delivery, WHO/FRH7FPP798.19. WHO, Geneva 1998, Available at: www.who.int (last accessed October 2007)
   Google Scholar
• Trussell J, Rodriguez G, Ellerson C. Updated estimates of the effectiveness of the Yuzpe regimen of emergency contraception. Contraception 1999; 59: 147–151
   PubMed Web of Science ®Google Scholar
• Dixon G W, Schlesselman J J, Ory H W, Blye R P. Ethinyl estradiol and conjugated estrogens as postcoital contraceptives. JAMA 1980; 244: 323–330
   Google Scholar
• Wilcox A J, Weinberg C R, Baird D D. Timing of sexual intercourse in relation to ovulation. Effects on the probability of conception, survival of the pregnancy, and sex of the baby. N Engl J Med 1995; 333: 1517–1521
   PubMed Web of Science ®Google Scholar
• Stirling A, Glasier A. Estimating efficacy of emergency contraception—How reliable are the data?. Contraception 2002; 66: 19–22
   PubMed Web of Science ®Google Scholar
• Yuzpe A A, Turlow H J, Ramzy I, Leyson J I. Post-coital contraception—A pilot study. J Reprod Med 1974; 30: 12–18
   Google Scholar
• Hoffman K O. Postcoital contraception: Experiences with ethynil estradiol/norgestrel and levonorgestrel only. Proceedings of the XIth Congress on Fertility and Sterility, R F Harrison, J Bonnar, W Thompson. MTP Press Ltd, Lancaster 1984; 311–316
   Google Scholar
• World Health Organization. Task Force on Post-Ovulatory Methods for Fertility Regulation, Special Programme for Research Training in Human Reproduction. Post coital contraception with levonorgestrel during the peri-ovulatory phase of the menstrual cycle. Contraception 1987; 36: 257–286
   Google Scholar
• 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: 428–433
   PubMed Web of Science ®Google Scholar
• von Hertzen H, Piaggio G, Ding J, et al. Low dose mifepristone and two regimens of levonorgestrel for emergency contraception: A WHO multicentre randomized trial. Lancet 2002; 360: 1803–1810
   PubMed Web of Science ®Google Scholar
• International Medical Advisory Panel, International Planned Parenthood Federation. IMAP statement on emergency contraception. IPPF Med Bull 2004; 38: 1–3
   Google Scholar
• Cheng L, Gulmezolu A M, Oel C J, et al. Interventions for emergency contraception. Cochrane Database Syst Rev 2004, 3: CD 001324
   Google Scholar
• Faculty of Family Planning and Reproductive Health Care Clinical Effectiveness Unit. FFPRHC guidelines. Emergency contraception. J Fam Plann Reprod Health Care 2006; 32: 121–128
   PubMed Web of Science ®Google Scholar
• Devoto L, Fuentes A, Palomino A, et al. Pharmacokinetics and endometrial tissue levels of levonorgestrel after administration of a single 1.5-mg dose by the oral and vaginal route. Fertil Steril 2005; 84: 46–51
   PubMed Web of Science ®Google Scholar
• Trussell J, Rodriguez G, Ellerston C. New estimates of the effectiveness of Yuzpe regimen for emergency contraception. Contraception 1998; 57: 363–369
   PubMed Web of Science ®Google Scholar
• Croxatto H B, Fuentealba B, Brache V, et al. Effects of the Yuzpe regimen, given during the follicular phase on ovarian function. Contraception 2002; 65: 121–128
   PubMed Web of Science ®Google Scholar
• Trussell J, Ellertson C, Dorflinger L. Effectiveness of the Yuzpe regimen of emergency contraception by cycle day of intercourse: implications for mechanism of action. Contraception 2003; 67: 167–171
   PubMed Web of Science ®Google Scholar
• Landgren B M, Johannisson E, Aedo A R, et al. The effect of levonorgestrel administered in large doses at different stages of the cycles on ovarian function and endometrial morphology. Contraception 1989; 39: 275–289
   PubMed Web of Science ®Google Scholar
• Kesseru E, Garmendia F, Westphal N, Parada J. The hormonal peripheral effects of dl-norgestrel in post-coital contraception. Contraception 1974; 10: 411–424
   PubMed Web of Science ®Google Scholar
• Yeung W SB, Chiu P CN, Wang C HYQ, et al. The effects of levonorgestrel on various sperm functions. Contraception 2002; 66: 453–457
   PubMed Web of Science ®Google Scholar
• Bahamondes L, Nascimento J AA, Munuce M J, et al. The in vitro effect of levonorgestrel on the acrosome reaction of human spermatozoa from fertile men. Contraception 2003; 68: 55–59
   PubMed Web of Science ®Google Scholar
• Gemzell-Danielsson K, Marions L. Mechanism of action of mifepristone and levonorgestrel when used for emergency contraception. Hum Reprod Update 2004; 10: 341–348
   PubMed Web of Science ®Google Scholar
• Durand M, Seppala M, Cravioto Mdel C, et al. Late follicular phase administration of levonorgestrel as an emergency contraceptive changes the secretory pattern of glycodelin in serum and endometrium during the luteal phase of the menstrual cycle. Contraception 2005; 71: 451–457
   PubMed Web of Science ®Google Scholar
• Christow A, Sun X, Gemzell-Daniellsson K. Effect of mifepristone and levonorgestrel on expression of steroid receptors in the human Fallopian tube. Mol Hum Reprod 2002; 8: 333–340
   PubMed Web of Science ®Google Scholar
• Durand M, Cravioto M C, Raymond E G, et al. On the mechanism of action of short-term levonorgestrel administration in emergency contraception. Contraception 2001; 64: 227–234
   PubMed Web of Science ®Google Scholar
• Croxatto H B, Devoto L, Durand M, et al. Mechanism of action of hormonal preparations used for emergency contraception: a review of the literature. Contraception 2001; 63: 111–121
   PubMed Web of Science ®Google Scholar
• Swahn M L, Westlund P, Johannisson E, Bygdeman M. Effect of post-coital contraceptive methods on the endometrium and the menstrual cycle. Acta Obstet Gynecol Scand 1996; 75: 738–744
   PubMed Web of Science ®Google Scholar
• Marions L, Hultenby K, Lindell I, et al. Emergency contraception with mifepristone and levonorgestrel: mechanism of action. Obstet Gynecol 2002; 100: 65–71
   PubMed Web of Science ®Google Scholar
• Croxatto H B. Pilules contraceptives d'urgence: Comment fonctionnent-elles?. IPPF Med Bull 2002; 36: 1–2
   Google Scholar
• Ortiz M E, Ortiz R E, Fuentes M A, et al. Postcoital administration of levonorgestrel does not interfere with post-fertilization events in the new-world monkey Cebus apella. Hum Reprod 2004; 19: 1352–1356
   PubMed Web of Science ®Google Scholar
• Muller Al, Llados Cm, Croxatto H B. Postcoital treatment with levonorgestrel does not disrupt postfertilization events in the rat. Contraception 2003; 67: 415–419
   PubMed Web of Science ®Google Scholar
• FFPRHC Guidance. Drug interactions with hormonal contraception. J Fam Plann Reprod Health Care 2006; 31: 139–151
   Web of Science ®Google Scholar
• Verhoeven V, Peremans L, Avonts D, Van Royen P. The profile of emergency contraception users in a chlamydia prevalence study in primary care in Belgium. Eur J Contracept Reprod Health Care 2006; 11: 175–180
   PubMed Web of Science ®Google Scholar
• World Health Organization (WHO). Improving access to quality care in family planning. Medical eligibility criteria for contraceptive use, 3rd edn. WHO, Geneva 2004
   Google Scholar
• Lahteemaki P, Heikinheimo O, Croxatto H, et al. Pharmacokinetics and metabolism of RU-486. J Steroid Biochem 1987; 27: 859–865
   PubMedGoogle Scholar
• Carbonell Esteve J L, Garcia R, Breto A, Llorente M. Emergency contraception in Cuba with 10 mg of mifepristone. Eur J Contracept Reprod Health Care 2007; 12: 162–167
   PubMed Web of Science ®Google Scholar
• World Health Organization. Task Force on Post-ovulatory Methods for Fertility Regulation. Comparison of three single doses of mifepristone as emergency contraception: a randomized trial. Lancet 1999; 353: 697–702
   PubMed Web of Science ®Google Scholar
• von Hertzen H, Piaggio G, Ding J, et al. Low dose mifepristone and two regimens of levonorgestrel for emergency contraception: a WHO multicentre randomized trial. Lancet 2002; 360: 1803–1810
   PubMed Web of Science ®Google Scholar
• von Hertzen H, Piaggio G. Levonorgestrel and mifepristone in emergency contraception. Steroids 2003; 68: 1107–1113
   PubMed Web of Science ®Google Scholar
• van der Stege J G, Pahl-van Beest E H, Beerthuizen R JCM, et al. Effects of a preovulatory single low dose of mifepristone on ovarian function. Eur J Contracept Reprod Health Care 2006; 11: 104–108
   PubMed Web of Science ®Google Scholar
• Ashok P W, Stalder C, Wagaarachchi P T, et al. A randomized study comparing a low dose of mifepristone and the Yuzpe regimen for emergency contraception. Br J Obstet Gynaecol 2002; 109: 553–560
   Google Scholar
• Lippes J, Malik T, Tatum H J. The post-coital copper-T. Adv Plann Parenth 1976; 11: 24–29
   PubMedGoogle Scholar
• Zhou L, Xiao B. Emergency contraception with multiload Cu-375 SL IUD: A multicenter clinical trial. Contraception 2001; 64: 107–112
   PubMed Web of Science ®Google Scholar
• Ortiz M E, Croxatto H B. Mode of action of IUDs. Contraception 1987; 36: 37–53
   PubMed Web of Science ®Google Scholar
• Ortiz M E, Croxatto H B. Copper-T intrauterine device and levonorgestrel intrauterine system: Biological bases of their mechanism of action. Contraception 2007; 75: S16–30
   PubMed Web of Science ®Google Scholar
• Segal S J, Alvarez-Sanchez F, Adejuwon C A. Absence of chorionic gonadotropin among intrauterine device users: Detection of a highly sensitive assay. Fertil Steril 1987; 47: 265–269
   PubMed Web of Science ®Google Scholar
• Farley T MN, Rosenberg M J, Rose P J, et al. Intrauterine devices and pelvic inflammatory disease: An international perspective. Lancet 1992; 339: 785–788
   PubMed Web of Science ®Google Scholar
• Mandiracioglu A, Mevsim V, Turgul O. Health personnel perceptions about emergency contraception in primary health-care centers. Eur J Contracept Reprod Health Care 2003; 8: 145–149
   PubMed Web of Science ®Google Scholar
• Lete I, Cabero L, Alvarez D, Olle C. Observational study on the use of emergency contraception in Spain: Results of a national survey. Eur J Contracept Reprod Health Care 2003; 8: 203–209
   PubMed Web of Science ®Google Scholar
• Zeteroglu S, Sahin G, Sahin H A, Bolluk G. Knowledge and attitudes towards emergency contraception of health-care providers in a region with a high birth rate. Eur J Contracept Reprod Health Care 2004; 9: 102–106
   PubMed Web of Science ®Google Scholar
• Jones S. Emergency contraception use by Irish teenagers. Eur J Contracept Reprod Health Care 2005; 10: 26–28
   PubMed Web of Science ®Google Scholar
• Uzuner A, Ünalan P, Akman M, et al. Providers' knowledge of, attitude to and practice of emergency contraception. Eur J Contracept Reprod Health Care 2005; 10: 43–50
   PubMed Web of Science ®Google Scholar
• Bildircin M, Sahin N H. Knowledge, attitudes and practices regarding emergency contraception among family-planning providers in Turkey. Eur J Contracept Reprod Health Care 2005; 10: 151–156
   PubMed Web of Science ®Google Scholar
• Bastianelli C, Farris M, Benagiano G. Reasons for requesting emergency contraception: A survey of 506 Italian women. Eur J Contracept Reprod Health Care 2005; 10: 157–163
   PubMed Web of Science ®Google Scholar
• Celik M, Ekerbicer H C, Ergun U G, Tekin N. Emergency contraception: Knowledge and attitudes of Turkish nursing and midwifery students. Eur J Contracept Reprod Health Care 2007; 12: 63–69
   PubMed Web of Science ®Google Scholar
• , et al. Consensus statement on emergency contraception. Contraception 1995; 52: 211–213
   PubMed Web of Science ®Google Scholar
• Jackson R A, Bimla Schwarz E, Freedman L, Darney P. Advance supply of emergency contraception: effect on use and usual contraception—A randomized trial. Obstet Gynecol 2003; 102: 8–16
   PubMed Web of Science ®Google Scholar
• Gold M A, Wolford J E, Smith K A, Parker A M. The effects of advance provision of emergency contraception on adolescent women's sexual and contraceptive behaviors. J Pediatr Adolesc Gynecol 2004; 17: 87–96
   PubMedGoogle Scholar
• Belzer M, Sanchez K, Olson J, et al. Advance supply of emergency contraception: a randomized trial in adolescent mothers. J Pediatr Adolesc Gynecol 2005; 18: 347–354
   PubMedGoogle Scholar
• Raine T R, Harper C C, Rocca C H, et al. Direct access to emergency contraception through pharmacies and effect on unintended pregnancy and STIs: a randomized controlled trial. JAMA 2005; 293: 54–62
   PubMed Web of Science ®Google Scholar
• Lo S S, Fan S Y, Ho P C, Glasier A F. Effect of advanced provision of emergency contraception on women's contraceptive behaviour: a randomized controlled trial. Hum Reprod 2004; 19: 2404–2410
   PubMed Web of Science ®Google Scholar
• Brandt D. Emergency contraception for teens and young women: researchers find that it doesn't inhibit contraceptive use or increase rates of sexually transmitted infections. Am J Nurs 2005; 105: 21
   Web of Science ®Google Scholar
• Marston C, Meltzer H, Majeed A. Impact on contraceptive practice of making emergency hormonal contraception available over the counter in Great Britain: repeated cross sectional surveys. BMJ 2005; 331: 271
   PubMed Web of Science ®Google Scholar
• Gainer E, Blum J, Toverud E L, et al. Bringing emergency contraception over the counter: experiences of nonprescription users in France, Norway, Sweden and Portugal. Contraception 2003; 68: 117–124
   PubMed Web of Science ®Google Scholar
• Ziebland S, Wyke S, Seaman P, et al. What happened when Scottish women were given advance supplies of emergency contraception? A survey and qualitative study of women's views and experiences. Soc Sci Med 2005; 60: 1767–1779
   PubMed Web of Science ®Google Scholar
• Larsson M, Aneblom G, Eurenius K, et al. Limited impact of an intervention regarding emergency contraceptive pills in Sweden—repeated surveys among abortion applicants. Eur J Contracept Reprod Health Care 2006; 11: 270–276
   PubMed Web of Science ®Google Scholar