title: The third generation oral contraceptive controversy. The evidence shows they are less safe than second generation pills.
authors.forename: P A
authors.initials: PA
authors.lastname: O'Brien
mesh_terms: D003257:Consumer Product Safety; D003276:Contraceptives, Oral / Q000009:adverse effects*; D005260:Female; D006801:Humans
chemical_list: D003276:Contraceptives, Oral