title: Comparative trials of low-dose combined oral contraceptives.
mesh_terms: D000328:Adult; D003276:Contraceptives, Oral / Q000009:adverse effects*; D003277:Contraceptives, Oral, Combined / Q000009:adverse effects*; D004338:Drug Combinations; D004997:Ethinyl Estradiol / Q000009:adverse effects; D019304:Ethinyl Estradiol-Norgestrel Combination; D005260:Female; D006801:Humans; D008656:Mestranol / Q000009:adverse effects; D009640:Norethindrone / Q000009:adverse effects / Q000031:analogs & derivatives; D000077563:Norethindrone Acetate; D009644:Norgestrel / Q000009:adverse effects; D011247:Pregnancy
chemical_list: D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D004338:Drug Combinations; C020416:norethindrone acetate, ethinyl estradiol, ferrous fumarate drug combination; D009644:Norgestrel; D004997:Ethinyl Estradiol; C014715:Norinyl; D019304:Ethinyl Estradiol-Norgestrel Combination; D000077563:Norethindrone Acetate; D008656:Mestranol; D009640:Norethindrone