Side effects and discontinuation of oral contraceptive use in southern Brazil.
D000293:Adolescent; D000328:Adult; D001938:Brazil; D003268:Contraception Behavior; D003280:Contraceptives, Oral, Synthetic / Q000009:adverse effects*; D005260:Female; D006801:Humans; D010819:Physician's Role; D011247:Pregnancy; D012494:Sampling Studies
D003280:Contraceptives, Oral, Synthetic