title: Antenatal screening for Down's syndrome.
authors.forename: K
authors.initials: K
authors.lastname: Spencer
authors.forename: J N
authors.initials: JN
authors.lastname: Macri
authors.forename: E J
authors.initials: EJ
authors.lastname: Coombes
authors.forename: A M
authors.initials: AM
authors.lastname: Ward
mesh_terms: D006063:Chorionic Gonadotropin / Q000097:blood; D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D006063:Chorionic Gonadotropin; D000509:alpha-Fetoproteins