1.     Arowojolu AO, Okewole IA, Adekunle AO. Comparative evaluation of the effectiveness and safety of two regimens of levonorgestrel for emergency contraception in Nigerians. Contraception. 2002;66:269-273.


2.     Belzer M, Yoshida E, Tejirian T, Tucker D, Chung K, Sanchez K. Advanced supply of emergency contraception for adolescent mothers increased utilization without reducing condom or primary contraception use. Research Presentations. J of Adolesc Health. 2003;32:122-123.


3.     CRLP. Center for Reproductive Law and Policy. Citizen's Petition. Submitted to the FDA on February 14, 2001.  Accessed on November 12, 2003.


4.     Croxatto H. Progress report to CONRAD Collaborative Center for Clinical Research. Report CIG-00-62. September 2002b.


5.     Croxatto HB, Fuentealba B, Brache V, et al. Effects of the Yuzpe regimen, given during the follicular phase, on ovarian function. Contraception. 2002c;65:121-128.


6.     Croxatto HB. Emergency contraception pills: how do they work?  IPPF Medical Bulletin 2002d;36:1-2.


7.     Ellertson C, Ambardekar S, Hedley A, Coyaji K, Trussell J, Blanchard K. Emergency contraception: randomized comparison of advance provision and information only. Obstet Gynecol. 2001a;98:570-575.


8.     Glasier A, Baird D. The effects of self-administering emergency contraception. New Engl J Med. 1998c;339:1-4.


9.     Glasier A. Emergency postcoital contraception. New Engl J Med. 1997;337: 1058-1064.


10.  Grimes DA, Raymond EG, Scott Jones B. Emergency contraception over-the-counter: the medical and legal imperatives. Obstet Gynecol. 2001;98:151-155.


11.  Ho PC, Kwan MS. A prospective randomized comparison of levonorgestrel with the Yuzpe regimen in post-coital contraception. Hum Reprod. 1993;8:389-392.


12.  Jones RK, Darroch JE, Henshaw SE. Contraceptive use among U.S. women having abortions in 2000-2001. Perspec Sexual Reprod Health. 2002b;34:294-303.


13.  Kahlenborn C, Stanford JB, Larimore WL. Postfertilization effect of hormonal emergency contraception. Ann Pharmacother. 2002;36:465-70.


14.  Kaiser Family Foundation. A national survey of women about their sexual health. Self Magazine. Summer 2003a.  


15.  Kaiser Family Foundation. National survey of women’s health care providers on reproductive health: emergency contraception. June 2003b.


16.  Kaiser Family Foundation. Lifetime Television, Vital Signs Inde No. 2: Emergency contraception (selected findings). November 2000.  


17.  Kook K, Gabelnick H, Duncan G. Pharmacokinetics of levonorgestrel 0.75 mg tablets. Contraception. 2002;66:73-76.


18.  McCann MF, Potter LS. Progestin-only oral contraception: a comprehensive review. Ectopic pregnancies. Contraception. 1994;50(Suppl 1):S44-49.


19.  MMWR. Youth Risk Behavior Surveillance – United States, 2001. MMWR Morbid Mortal Wkly Rep. June 28, 2002; 51(SS04);1-64. 


20.  Müller AL, Llados CM, Croxatto HB. Postcoital treatment with levonorgestrel does not disrupt postfertilization events in the rat. Contraception. 2003;67:415-419.


21.  Riain A. Increasing the effectiveness of contraceptive usage in university students. Eur J Contracept Reprod Health Care. 1998;3:124-128.


22.  Peterson LS. Contraceptive use in the United States: 1982-90. Vital and Health Statistics of the Centers for Disease Control and Prevention.  Advance Data. 1995;260:1-15.


23.  Piaggio G, von Hertzen H, Grimes DA, Van Look PF. Timing of emergency contraception with levonorgestrel or the Yuzpe regimen [letter]. Lancet. 1999; 353:721.


24.  Raine T, Harper C, Leon K, Darney P. Emergency Contraception: Advance provision in a young, high-risk clinic population. Obstet Gynecol. 2000;96:1-7.


25.  Raymond EG, Dalebout SM, Camp SI. Comprehension of a prototype over-the-counter label for an emergency contraceptive pill product. Obstet Gynecol. 2002a; 100:342-349.


26.  Roye CF, Johnsen JRM.  Adolescent and emergency contraception. J Pediatr Health Care. 2002;16:3-9.


27.  Roye CF. Routine provision of emergency contraception to teens and subsequent condom use: a preliminary study [letter].  J Pediatr Health Care. 2001;28:165-166.


28.  Sucato GS, Gardner JS, Koepsell TD.  Adolescents’ use of emergency contraception provided by Washington state pharmacists. J Pediatr Adolesc Gynecol. 2001;14:163-169.


29.  Trussell J, Stewart F, Guest F, Hatcher RA. Emergency contraceptive pills: a simple proposal to reduce unintended pregnancies. Fam Plann Perspect.  1992b; 24:269-273.


30.  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. 2003c;67:167-171.  (Preprint Trussell 2002)


31.  UCSF. University of California, San Francisco. Results of the analysis of provision of emergency contraception to women enrolled in the study prior to December 31, 2001: Pharmacy access and advance distribution evaluation. Study #H9738-18501-02. Report prepared by PinneyAssociates. January 30, 2003b.


32.  Ugocsai G, Rózsa M, Ugocsai P. Scanning electron microscopic (SEM) changes of the endometrium in women taking high doses of levonorgestrel as emergency postcoital contraception. Contraception. 2002;66:433-437.


33.  United States Census Bureau. U.S. Summary: 2000. Census 2000 Profile. Issued July 2002. 


34.  Van Look PFA, von Hertzen H. Emergency contraception. Br Med Bull. 1993;49: 158-170.


35.  van Royen AR, Calvin CK, Lightner CR. Knowledge and attitudes about emergency contraception in a military population. Obstet Gynecol. 2000;96:921-925.


36.  VHS. Fertility, Family Planning, and Women's Health: New Data From the 1995 National Survey of Family Growth. Vital and Health Statistics. Series 23. No. 19. May 1997. Available at: Accessed November 12, 2003.


37.  WCC/FHI, Women’s Capital Corporation and Family Health International. Plan BŇ Over-the-Counter Label Comprehension Study Report. FHI Study #9728. Final Study Report. November 5, 2001.


38.  WCC/FHI,Women’s Capital Corporation and Family Health International. Plan BŇ OTC Actual Use Study. Phase 3. Non-comparative case series study of Plan BŇ levonorgestrel emergency contraceptive pills provided using a simulated over-the-counter approach. FHI Study #9727. Final Study Report. 2002. (Updated 2003)


39.  Wells ES, Hutchings J, Gardner JS, et al.  Using pharmacists in Washington State to expand access to emergency contraception. Fam Plann Perspect. 1998;30:288-290.


40.  WHO #92908. Report of the pivotal study: A prospective, randomized, multi-center study to compare the Yuzpe regimen with levonorgestrel in emergency postcoital contraception. November 15, 1998.  Published.                                                 Task Force on Postovulatory Methods of Fertility Regulation. Randomised controlled trial of levonorgestrel versus the Yuzpe regimen of combined oral contraceptives for emergency contraception. Lancet 1998b;352:428-433.


41.  WHO Task Force on Post-Ovulatory Methods for Fertility Regulation. United Nations Development Programme/ United Nations Population Fund/World Health Organization/World Bank Special Programme of Research, Development and Research Training in Human Reproduction. Efficacy and side effects of immediate postcoital levonorgestrel used repeatedly for contraception. Contraception 2000a; 61: 303-308.


42.  WHO Research Group on Post-ovulatory Methods of Fertility Regulation.  Published.                                                                                                              von Hertzen H, Piaggio G, Ding J, et al. Low dose mifepristone and two regimens of levonorgestrel for emergency contraception: a WHO multicentre randomised trial. Lancet. 2002; 360:1803-1810.


43.  Wilcox AJ, Weinberg CR, Baird DD.  Timing of sexual intercourse in relation to ovulation: effects on the probability of contraception, survival of the pregnancy, and sex of the baby. New Engl J Med. 1995;333:1517-1521.


44.  Wu S, Wang C, Wang Y. [A randomized, double-blind, multicentre study on comparing levonorgestrel and mifepristone for emergency contraception] [Chinese]. Zhonghua Fu Chan Ke Za Zhi. 1999;34:327-330.   [Full text in Chinese available upon request]


45.  Yeung WSB, Chiu PCN, Wang CH, Yao YQ, Ho P-C. The effects of levonorgestrel on various sperm functions. Contraception. 2002;66:453-457.


46.  Downing D.  Pharmacist prescribing of emergency contraception: the Washington State experience.  Emergency contraception the pharmacist’s role. APhA Special Report. Available at: contra.pdf Accessed on November 12, 2003