The contraceptive efficacy of 10mg or 25mg of norethindrone given orally on day 15-22 of the human menstrual cycle.
D000284:Administration, Oral; D000328:Adult; D001667:Binding, Competitive; D006063:Chorionic Gonadotropin / Q000097:blood; D003276:Contraceptives, Oral; D003864:Depression, Chemical; D004341:Drug Evaluation; D010064:Embryo Implantation / Q000187:drug effects; D004958:Estradiol / Q000097:blood; D005260:Female; D006801:Humans; D008875:Middle Aged; D009640:Norethindrone / Q000008:administration & dosage* / Q000009:adverse effects / Q000494:pharmacology; D010060:Ovulation; D011247:Pregnancy; D011274:Pregnancy, Tubal; D011374:Progesterone / Q000097:blood; D011485:Protein Binding; D011863:Radioimmunoassay; D013997:Time Factors; D014592:Uterine Hemorrhage / Q000139:chemically induced
D006063:Chorionic Gonadotropin; D003276:Contraceptives, Oral; D011374:Progesterone; D004958:Estradiol; D009640:Norethindrone