Emergency contraception: when and how to use it.
Sanfilippo
Joseph
J
Department of Obstetrics, Gynecology, and Reproductive Sciences, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA.
Downing
Don
D
D000293:Adolescent; D000328:Adult; D044363:Contraception, Postcoital / Q000191:economics / Q000379:methods*; D003280:Contraceptives, Oral, Synthetic / Q000009:adverse effects / Q000494:pharmacology; D003281:Contraceptives, Postcoital; D003376:Counseling; D005260:Female; D006801:Humans; D016912:Levonorgestrel / Q000009:adverse effects / Q000494:pharmacology; D008597:Menstrual Cycle / Q000187:drug effects; D011247:Pregnancy; D011253:Pregnancy in Adolescence / Q000517:prevention & control* / Q000706:statistics & numerical data; D014481:United States / Q000453:epidemiology
D003280:Contraceptives, Oral, Synthetic; D003281:Contraceptives, Postcoital; D016912:Levonorgestrel