[A multi-center randomized controlled trial of three types of intrauterine device inserted immediately after vacuum aspiration].
D000028:Abortion, Induced; D000328:Adult; D003267:Contraception / Q000379:methods*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007433:Intrauterine Device Expulsion; D007434:Intrauterine Devices / Q000145:classification; D007435:Intrauterine Devices, Copper; D007436:Intrauterine Devices, Medicated; D008875:Middle Aged; D010146:Pain / Q000453:epidemiology / Q000209:etiology; D019106:Postoperative Hemorrhage / Q000453:epidemiology / Q000209:etiology; D011247:Pregnancy; D014619:Vacuum Curettage; D055815:Young Adult