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