title: Use-effectiveness of oral contraceptives by demographic characteristics.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D003276:Contraceptives, Oral / Q000008:administration & dosage; D003710:Demography; D005260:Female; D006801:Humans; D009518:New York; D010298:Parity; D012959:Socioeconomic Factors
chemical_list: D003276:Contraceptives, Oral