title: [Notifications to the Netherlands Pharmacovigilance Foundation Lareb of the expulsion of a vaginal contraceptive ring (NuvaRing) and of pregnancy during the use of it].
authors.forename: M T
authors.initials: MT
authors.lastname: Op ten Berg
mesh_terms: D000328:Adult; D003257:Consumer Product Safety; D003271:Contraceptive Agents, Female; D003274:Contraceptive Devices, Female / Q000592:standards*; D005260:Female; D006801:Humans; D011247:Pregnancy; D018873:Pregnancy Rate
chemical_list: D003271:Contraceptive Agents, Female