title: Prenatal screening for Down's syndrome.
authors.forename: M J
authors.initials: MJ
authors.lastname: Stone
authors.forename: S F
authors.initials: SF
authors.lastname: Levy
authors.forename: W
authors.initials: W
authors.lastname: Tait
authors.forename: P J
authors.initials: PJ
authors.lastname: Allan
authors.forename: P J
authors.initials: PJ
authors.lastname: Riley
mesh_terms: D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D006801:Humans; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000191:economics; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D000509:alpha-Fetoproteins