title: Prenatal screening for Down syndrome: tempering practice with policy.
authors.forename: J E
authors.initials: JE
authors.lastname: Haddow
mesh_terms: D000649:Amniocentesis; D004314:Down Syndrome / Q000000981:diagnostic imaging*; D005260:Female; D006291:Health Policy; D006801:Humans; D011247:Pregnancy; D016216:Ultrasonography, Prenatal