title: Long-term administration of norethindrone in fertility control.
mesh_terms: D003267:Contraception; D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D005260:Female; D006801:Humans; D008134:Long-Term Care; D009640:Norethindrone; D011374:Progesterone / Q000031:analogs & derivatives
chemical_list: D003270:Contraceptive Agents; D003276:Contraceptives, Oral; D011374:Progesterone; D009640:Norethindrone
keywords: CONTRACEPTIVES, ORAL; PROGESTERONE/related compounds