[Comparative evaluation of UCD and UCD-Cu].
Zeng
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D001208:Asia; D001723:Birth Rate; D002681:China; D003267:Contraception; D003710:Demography; D003906:Developing Countries; D004194:Disease; D005193:Family Planning Services; D005202:Asia, Eastern; D005298:Fertility; D005500:Follow-Up Studies; D007434:Intrauterine Devices; D007435:Intrauterine Devices, Copper; D015993:Life Tables; D008595:Menorrhagia; D008599:Menstruation Disturbances; D011153:Population; D011157:Population Dynamics; D018873:Pregnancy Rate; D012106:Research
Asia; China; Comparative Studies; Contraception; Contraceptive Effectiveness; Contraceptive Methods--complications; Demographic Analysis; Demographic Factors; Developing Countries; Diseases; Eastern Asia; Family Planning; Fertility; Fertility Measurements; Follow-up Studies; Iud, Copper Releasing--complications; Iud--complications; Life Table Method; Menorrhagia; Menstruation Disorders; Population; Population Dynamics; Pregnancy Rate; Research Methodology; Research Report; Studies