title: [Some thoughts on clinical family planning studies].
authors.forename: Y
authors.initials: Y
authors.lastname: Wu
authors.forename: J
authors.initials: J
authors.lastname: Cao
mesh_terms: D006063:Chorionic Gonadotropin / Q000276:immunology; D005193:Family Planning Services; D006801:Humans; D007434:Intrauterine Devices; D012107:Research Design; D014612:Vaccines
chemical_list: D006063:Chorionic Gonadotropin; D014612:Vaccines