title: Loop vs. shield: a competing risks analysis of IUD termination.
mesh_terms: D000328:Adult; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D007433:Intrauterine Device Expulsion; D007434:Intrauterine Devices / Q000009:adverse effects*; D008599:Menstruation Disturbances / Q000209:etiology; D011247:Pregnancy; D012306:Risk