Induction of the first menstruation after childbirth.
D000293:Adolescent; D000328:Adult; D001942:Breast Feeding; D004997:Ethinyl Estradiol / Q000627:therapeutic use*; D005260:Female; D006801:Humans; D007774:Lactation; D008598:Menstruation / Q000187:drug effects; D009640:Norethindrone / Q000627:therapeutic use*; D011247:Pregnancy
D004997:Ethinyl Estradiol; D009640:Norethindrone