title: Research activities in the field of oral contraceptives in the People's Republic of China.
mesh_terms: D000014:Abnormalities, Drug-Induced / Q000209:etiology; D001943:Breast Neoplasms / Q000139:chemically induced; D002681:China; D003276:Contraceptives, Oral / Q000009:adverse effects / Q000494:pharmacology; D003277:Contraceptives, Oral, Combined / Q000494:pharmacology; D003281:Contraceptives, Postcoital / Q000494:pharmacology; D003692:Delayed-Action Preparations; D005260:Female; D005833:Genital Neoplasms, Female / Q000139:chemically induced; D006801:Humans; D008535:Megestrol / Q000494:pharmacology; D009640:Norethindrone / Q000494:pharmacology; D012106:Research
chemical_list: D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D003281:Contraceptives, Postcoital; D003692:Delayed-Action Preparations; D008535:Megestrol; D009640:Norethindrone