title: Biochemical screening.
authors.affiliation: Medical College of St. Bartholomew's Hospital, London, UK.
authors.forename: H S
authors.initials: HS
authors.lastname: Cuckle
authors.forename: N J
authors.initials: NJ
authors.lastname: Wald
mesh_terms: D006063:Chorionic Gonadotropin / Q000097:blood; D004314:Down Syndrome / Q000097:blood* / Q000175:diagnosis / Q000453:epidemiology; D004964:Estriol / Q000097:blood; D005260:Female; D005820:Genetic Testing / Q000379:methods* / Q000592:standards; D006801:Humans; D008423:Maternal Age; D009436:Neural Tube Defects / Q000097:blood / Q000175:diagnosis / Q000000981:diagnostic imaging; D011268:Pregnancy-Specific beta 1-Glycoproteins / Q000737:chemistry; D011296:Prenatal Diagnosis / Q000379:methods* / Q000592:standards; D012307:Risk Factors; D012680:Sensitivity and Specificity; D014463:Ultrasonography; D000509:alpha-Fetoproteins / Q000737:chemistry
chemical_list: D006063:Chorionic Gonadotropin; D011268:Pregnancy-Specific beta 1-Glycoproteins; D000509:alpha-Fetoproteins; D004964:Estriol