title: Endometrial morphology and peripheral steroid levels in women with and without intermenstrual bleeding during contraception with the 300 microgram norethisterone (NET) minipill.
mesh_terms: D000328:Adult; D004717:Endometrium / Q000473:pathology*; D004958:Estradiol / Q000097:blood*; D004997:Ethinyl Estradiol / Q000627:therapeutic use; D005260:Female; D005470:Fluorometry; D006801:Humans; D008796:Metrorrhagia / Q000139:chemically induced / Q000188:drug therapy / Q000473:pathology*; D008854:Microscopy, Electron; D009640:Norethindrone / Q000009:adverse effects*; D011374:Progesterone / Q000097:blood*
chemical_list: D004997:Ethinyl Estradiol; D011374:Progesterone; D004958:Estradiol; D009640:Norethindrone