title: Three stage contingent screening for Down syndrome.
authors.forename: Wayne J
authors.initials: WJ
authors.lastname: Huttly
authors.forename: Joan K
authors.initials: JK
authors.lastname: Morris
authors.forename: Jonathan P
authors.initials: JP
authors.lastname: Bestwick
authors.forename: Nicholas J
authors.initials: NJ
authors.lastname: Wald
authors.forename: Karl
authors.initials: K
authors.lastname: Murphy
authors.forename: Pranav P
authors.initials: PP
authors.lastname: Pandya
mesh_terms: D004314:Down Syndrome / Q000175:diagnosis*; D005189:False Positive Reactions; D005260:Female; D006801:Humans; D009098:Multiphasic Screening / Q000379:methods* / Q000523:psychology*; D048208:Nuchal Translucency Measurement; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis / Q000379:methods*