title: Screening for Down's syndrome. Biochemical screening offers advantages.
authors.forename: P A
authors.initials: PA
authors.lastname: Boyd
authors.forename: M
authors.initials: M
authors.lastname: Jefferies
authors.forename: P F
authors.initials: PF
authors.lastname: Chamberlain
authors.forename: A J
authors.initials: AJ
authors.lastname: Crocker
mesh_terms: D000328:Adult; D015415:Biomarkers / Q000097:blood; D004314:Down Syndrome / Q000097:blood / Q000175:diagnosis*; D005260:Female; D005865:Gestational Age; D006801:Humans; D008423:Maternal Age; D011237:Predictive Value of Tests; D011247:Pregnancy; D018566:Pregnancy, High-Risk; D011296:Prenatal Diagnosis / Q000379:methods*; D016216:Ultrasonography, Prenatal
chemical_list: D015415:Biomarkers