title: Efficacy of the Dalkon shield in contraception.
mesh_terms: D000293:Adolescent; D000328:Adult; D003267:Contraception; D005260:Female; D006801:Humans; D007433:Intrauterine Device Expulsion; D007434:Intrauterine Devices / Q000009:adverse effects; D008599:Menstruation Disturbances / Q000209:etiology; D010298:Parity; D011247:Pregnancy