title: Unwanted pregnancy on self-medication with St John's wort despite hormonal contraception.
authors.forename: Ute I
authors.initials: UI
authors.lastname: Schwarz
authors.forename: Barbara
authors.initials: B
authors.lastname: Büschel
authors.forename: W
authors.initials: W
authors.lastname: Kirch
mesh_terms: D000328:Adult; D003278:Contraceptives, Oral, Hormonal; D004347:Drug Interactions; D005260:Female; D006801:Humans; D020902:Hypericum; D011247:Pregnancy; D011275:Pregnancy, Unwanted; D012651:Self Medication
chemical_list: D003278:Contraceptives, Oral, Hormonal