China changes from the stainless steel ring to modern IUDs.
D001208:Asia; D055598:Chemical Phenomena; D002621:Chemistry; D002681:China; D003267:Contraception; D003906:Developing Countries; D016656:Family Planning Policy; D005193:Family Planning Services; D005202:Asia, Eastern; D007287:Inorganic Chemicals; D007434:Intrauterine Devices; D007435:Intrauterine Devices, Copper; D008670:Metals; D011640:Public Policy; D013193:Stainless Steel
D007287:Inorganic Chemicals; D008670:Metals; D013193:Stainless Steel
Asia; China; Contraception; Contraceptive Methods; Developing Countries; Eastern Asia; Family Planning; Family Planning Policy; Ingredients And Chemicals; Inorganic Chemicals; Iud; Iud, Copper Releasing; Iud, Unmedicated; Metals; Policy; Population Policy; Social Policy; Stainless Steel