References & Sources - August 15, 1998 
Non-estrogen morning-after pill works best
A 14-country study by the World Health Organization indicates that a pill without estrogen but with a larger dose of progestin prevents conception better than a combined estrogen-progestin pill and causes fewer side effects.
References:
Delbanco, S.F. . . . F.H. Stewart. 1998. Missed opportunities. Archives of Pediatric and Adolescent Medicine 152(August):727.
Grimes, D. . . . P.F.A. Van Look. 1998. Randomised controlled trial of levonorgestrel versus the Yuzpe regimen of combined oral contraceptives for emergency contraception. Lancet 352(Aug. 8):428.
Further Readings:
1995. After the morning after and the morning after that. Lancet 345(June 3):1381.
Ford, C. 1998. Preventing teen pregnancy with emergency contraception. Archives of Pediatric and Adolescent Medicine 152(August):725.
Glasier, A. 1997. Emergency postcoital contraception. New England Journal of Medicine 337(Oct. 9):1058.
Grimes, D.A. 1997. Emergency contraception — expanding opportunities for primary prevention. New England Journal of Medicine 337(Oct. 9):1078.
Guillebaud, J. 1998. Time for emergency contraception with levonorgestrel alone. Lancet 352(Aug. 8):416.
Sources:
Suzanne F. Delbanco
University of California, Berkeley
2814B Regent Street
Berkeley, CA 94705Felicia H. Stewart
Henry J. Kaiser Family Foundation
2400 Sand Hill Road
Menlo Park, CA 94025Paul F.A. Van Look
World Health Organization
Special Programme of Research, Development, and Research Training in Human Reproduction
1211 Geneva 27
Switzerland
8/15/98
copyright 1998 ScienceService
