Control of conception with a new progestational steroid.
D000328:Adult; D001706:Biopsy; D003276:Contraceptives, Oral; D004717:Endometrium / Q000187:drug effects*; D004958:Estradiol / Q000494:pharmacology; D005260:Female; D006801:Humans; D008875:Middle Aged; D011372:Progestins
D003276:Contraceptives, Oral; D011372:Progestins; D004958:Estradiol