title: Contraceptive mechanism of microdose norethindrone.
mesh_terms: D000328:Adult; D000362:Agar; D002452:Cell Count; D002582:Cervix Mucus / Q000032:analysis / Q000187:drug effects*; D004586:Electrophoresis; D004717:Endometrium / Q000187:drug effects*; D004958:Estradiol / Q000652:urine; D004964:Estriol / Q000652:urine; D004967:Estrogens / Q000652:urine; D004970:Estrone / Q000652:urine; D005260:Female; D005640:Follicle Stimulating Hormone / Q000097:blood; D006801:Humans; D007986:Luteinizing Hormone / Q000097:blood; D008297:Male; D009640:Norethindrone / Q000008:administration & dosage / Q000494:pharmacology*; D010060:Ovulation / Q000187:drug effects*; D011276:Pregnanediol / Q000652:urine; D011374:Progesterone / Q000097:blood; D013094:Spermatozoa; D014621:Vagina / Q000187:drug effects*
chemical_list: D004967:Estrogens; D004970:Estrone; D011374:Progesterone; D004958:Estradiol; D000362:Agar; D007986:Luteinizing Hormone; D005640:Follicle Stimulating Hormone; D004964:Estriol; D011276:Pregnanediol; D009640:Norethindrone