title: Biochemical screening for Down's syndrome.
authors.forename: M
authors.initials: M
authors.lastname: James
authors.forename: R
authors.initials: R
authors.lastname: Fox
mesh_terms: D000328:Adult; D004314:Down Syndrome / Q000517:prevention & control*; D005260:Female; D006801:Humans; D008423:Maternal Age; D011296:Prenatal Diagnosis / Q000379:methods*; D012680:Sensitivity and Specificity