[Current status and development of emergency contraception].
Cheng
L
L
D003267:Contraception / Q000379:methods*; D003282:Contraceptives, Postcoital, Hormonal; D005260:Female; D006801:Humans; D007435:Intrauterine Devices, Copper; D013997:Time Factors
D003282:Contraceptives, Postcoital, Hormonal