title: Four years experience with the Cu7 200 device-endouterine copper in fertility control.
mesh_terms: D000293:Adolescent; D000328:Adult; D003300:Copper; D005260:Female; D006801:Humans; D007433:Intrauterine Device Expulsion; D007434:Intrauterine Devices / Q000009:adverse effects; D011247:Pregnancy; D014592:Uterine Hemorrhage / Q000209:etiology
chemical_list: D003300:Copper