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: F J M E
authors.initials: FJ
authors.lastname: Roumen
mesh_terms: D003271:Contraceptive Agents, Female / Q000494:pharmacology*; D003274:Contraceptive Devices, Female / Q000592:standards*; D004867:Equipment Design; D004868:Equipment Failure / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D011247:Pregnancy; D018873:Pregnancy Rate
chemical_list: D003271:Contraceptive Agents, Female