Efficacy of postcoital contraception.
Raymond
Elizabeth
E
Trussell
James
J
D003281:Contraceptives, Postcoital; D004630:Emergencies; D005260:Female; D006801:Humans; D012107:Research Design; D016896:Treatment Outcome; D014463:Ultrasonography; D014599:Uterus / Q000000981:diagnostic imaging*
D003281:Contraceptives, Postcoital