Oral contraception by the sequential approach.
D015068:17-Ketosteroids / Q000378:metabolism; D001780:Blood Coagulation Tests; D001835:Body Weight; D003276:Contraceptives, Oral / Q000494:pharmacology*; D005193:Family Planning Services; D005260:Female; D006801:Humans; D008599:Menstruation Disturbances / Q000209:etiology; D008656:Mestranol / Q000494:pharmacology*; D009640:Norethindrone / Q000494:pharmacology*; D014626:Vaginal Smears
D015068:17-Ketosteroids; D003276:Contraceptives, Oral; D008656:Mestranol; D009640:Norethindrone