title: [The effects of MLCu 250 and VCu 200 on rural women who had experienced failure with ring IUD].
authors.forename: L J
authors.initials: LJ
authors.lastname: Zhang
mesh_terms: D001208:Asia; D002681:China; D003267:Contraception; D003268:Contraception Behavior; D003710:Demography; D003906:Developing Countries; D005193:Family Planning Services; D005202:Asia, Eastern; D007434:Intrauterine Devices; D007435:Intrauterine Devices, Copper; D011153:Population; D011154:Population Characteristics; D012106:Research; D012424:Rural Population
keywords: Asia; China; Clinical Research; Contraception; Contraception Continuation; Contraception Research; Contraceptive Effectiveness; Contraceptive Methods; Contraceptive Usage; Demographic Factors; Developing Countries; Eastern Asia; Family Planning; Iud; Iud, Copper Releasing; Population; Population Characteristics; Research Methodology; Rural Population--women