title: The United Kingdom Dalkon Shield trial: two years of observation.
mesh_terms: D005193:Family Planning Services; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007434:Intrauterine Devices / Q000009:adverse effects; D011247:Pregnancy; D006113:United Kingdom; D014592:Uterine Hemorrhage / Q000209:etiology