title: [A clinical study on the comparison of the performance of stainless steel ring (SSR), uterine cavity-shaped device (UCD), MLCu250 and TCu220C].
mesh_terms: D001208:Asia; D002681:China; D003267:Contraception; D003268:Contraception Behavior; D003906:Developing Countries; D005069:Evaluation Studies as Topic; D005193:Family Planning Services; D005202:Asia, Eastern; D007434:Intrauterine Devices; D010342:Patient Acceptance of Health Care; D012106:Research
keywords: Asia; China; Clinical Research; Comparative Studies; Contraception; Contraception Termination--indications; Contraceptive Effectiveness; Contraceptive Methods; Contraceptive Usage; Developing Countries; Eastern Asia; Family Planning; Iud; Method Acceptability; Research Methodology; Studies; Use-effectiveness