New studies link IUDs, infertility; say copper devices safer.
D001695:Biology; D003267:Contraception; D004194:Disease; D005193:Family Planning Services; D007246:Infertility; D007434:Intrauterine Devices; D007435:Intrauterine Devices, Copper; D010827:Physiology; D012098:Reproduction; D012106:Research; D014566:Urogenital System
Biology; Clinical Research; Contraception; Contraceptive Methods--side effects; Diseases; Family Planning; Infertility; Iud, Copper Releasing--side effects; Iud, Unmedicated--side effects; Iud--side effects; Physiology; Reproduction; Research Methodology; Urogenital Effects; Urogenital System