title: Ultrasonic localization of intrauterine contraceptive devices.
mesh_terms: D000029:Abortion, Legal; D000328:Adult; D005260:Female; D005333:Fetus; D005865:Gestational Age; D006801:Humans; D007434:Intrauterine Devices; D008670:Metals; D008722:Methods; D011095:Polyethylenes; D011247:Pregnancy; D014463:Ultrasonography; D014599:Uterus / Q000033:anatomy & histology
chemical_list: D008670:Metals; D011095:Polyethylenes