title: Second trimester screening for trisomy 21.
authors.forename: R
authors.initials: R
authors.lastname: Osathanondh
authors.forename: J A
authors.initials: JA
authors.lastname: Canick
authors.forename: K B
authors.initials: KB
authors.lastname: Abell
authors.forename: L D
authors.initials: LD
authors.lastname: Stevens
authors.forename: G E
authors.initials: GE
authors.lastname: Palomaki
authors.forename: G J
authors.initials: GJ
authors.lastname: Knight
authors.forename: J E
authors.initials: JE
authors.lastname: Haddow
mesh_terms: D004314:Down Syndrome / Q000175:diagnosis*; D005260:Female; D006801:Humans; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011296:Prenatal Diagnosis