title: Use of free beta-hCG in Down's syndrome screening.
authors.forename: N
authors.initials: N
authors.lastname: Wald
authors.forename: A
authors.initials: A
authors.lastname: Hackshaw
authors.forename: J E
authors.initials: JE
authors.lastname: Haddow
authors.forename: G E
authors.initials: GE
authors.lastname: Palomaki
authors.forename: G J
authors.initials: GJ
authors.lastname: Knight
mesh_terms: D000293:Adolescent; D000328:Adult; D006063:Chorionic Gonadotropin / Q000097:blood*; D018997:Chorionic Gonadotropin, beta Subunit, Human; D004314:Down Syndrome / Q000097:blood / Q000175:diagnosis*; D005260:Female; D006801:Humans; D008423:Maternal Age; D008875:Middle Aged; D010446:Peptide Fragments / Q000097:blood*; D011237:Predictive Value of Tests; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000706:statistics & numerical data*
chemical_list: D006063:Chorionic Gonadotropin; D018997:Chorionic Gonadotropin, beta Subunit, Human; D010446:Peptide Fragments