Emergency contraception: WHO Task Force study.
Trussell
J
J
D002986:Clinical Trials as Topic; D003281:Contraceptives, Postcoital / Q000008:administration & dosage*; D004334:Drug Administration Schedule; D005260:Female; D006801:Humans; D015588:Observer Variation; D014944:World Health Organization
D003281:Contraceptives, Postcoital