title: A comparison of the Dalkon Shield and Gravigard (copper 7) intra-uterine devices in Southampton.
mesh_terms: D000367:Age Factors; D003300:Copper; D005260:Female; D006801:Humans; D007433:Intrauterine Device Expulsion; D007434:Intrauterine Devices / Q000009:adverse effects; D010298:Parity; D011247:Pregnancy; D014592:Uterine Hemorrhage / Q000209:etiology
chemical_list: D003300:Copper