Clinical evaluation of a new sequential oral contraceptive agent.
D000328:Adult; D003276:Contraceptives, Oral / Q000009:adverse effects; D005260:Female; D006801:Humans; D008656:Mestranol / Q000009:adverse effects; D009640:Norethindrone / Q000009:adverse effects; D011247:Pregnancy
D003276:Contraceptives, Oral; D008656:Mestranol; D009640:Norethindrone