Seven years of clinical experience with a sequential oral contraceptive.
D000014:Abnormalities, Drug-Induced / Q000453:epidemiology; D000328:Adult; D003276:Contraceptives, Oral / Q000494:pharmacology; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007231:Infant, Newborn; D011247:Pregnancy / Q000187:drug effects; D013223:Statistics as Topic
D003276:Contraceptives, Oral