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