title: Down's syndrome screening in twin pregnancies.
authors.forename: T M
authors.initials: TM
authors.lastname: Reynolds
mesh_terms: D006063:Chorionic Gonadotropin / Q000097:blood*; D004200:Diseases in Twins / Q000175:diagnosis*; D004314:Down Syndrome / Q000175:diagnosis*; D004992:Ethics, Medical; D005260:Female; D005820:Genetic Testing; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis
chemical_list: D006063:Chorionic Gonadotropin