title: Plasma levels of d-norgestrel and ovarian function in women using intravaginal rings impregnated with dl-norgestrel for several cycles.
mesh_terms: D000328:Adult; D003274:Contraceptive Devices, Female; D003692:Delayed-Action Preparations; D004341:Drug Evaluation; D004958:Estradiol / Q000097:blood; D005260:Female; D006801:Humans; D009644:Norgestrel / Q000009:adverse effects / Q000097:blood / Q000494:pharmacology*; D010053:Ovary / Q000187:drug effects* / Q000502:physiology; D010060:Ovulation / Q000187:drug effects; D011374:Progesterone / Q000097:blood; D012826:Silicone Elastomers; D014592:Uterine Hemorrhage / Q000139:chemically induced; D014621:Vagina; D014626:Vaginal Smears
chemical_list: D003692:Delayed-Action Preparations; D012826:Silicone Elastomers; D009644:Norgestrel; D011374:Progesterone; D004958:Estradiol