Tri-Norinyl and Ortho-Novum 7/7/7--two triphasic oral contraceptives.
D002986:Clinical Trials as Topic; D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D004338:Drug Combinations; D004997:Ethinyl Estradiol; D005260:Female; D006801:Humans; D009640:Norethindrone; D011247:Pregnancy
D003276:Contraceptives, Oral; D003277:Contraceptives, Oral, Combined; D004338:Drug Combinations; C020416:norethindrone acetate, ethinyl estradiol, ferrous fumarate drug combination; D004997:Ethinyl Estradiol; D009640:Norethindrone