[Progress in the study of family planning in China].
Wu
Y
Y
D002681:China; D004343:Drug Implants; D005193:Family Planning Services; D006801:Humans; D007435:Intrauterine Devices, Copper; D007436:Intrauterine Devices, Medicated; D015735:Mifepristone / Q000627:therapeutic use
D004343:Drug Implants; D015735:Mifepristone