title: Evaluation of effect of analytical imprecision in maternal serum screening for Down's syndrome.
authors.forename: K
authors.initials: K
authors.lastname: Spencer
mesh_terms: D015415:Biomarkers / Q000097:blood; D018997:Chorionic Gonadotropin, beta Subunit, Human / Q000097:blood*; D016001:Confidence Intervals; D003951:Diagnostic Errors; D004314:Down Syndrome / Q000175:diagnosis* / Q000196:embryology; D005260:Female; D006801:Humans; D011247:Pregnancy / Q000097:blood*; D011266:Pregnancy-Associated Plasma Protein-A / Q000032:analysis*; D011296:Prenatal Diagnosis / Q000379:methods*; D015203:Reproducibility of Results; D000509:alpha-Fetoproteins / Q000032:analysis*
chemical_list: D015415:Biomarkers; D018997:Chorionic Gonadotropin, beta Subunit, Human; D000509:alpha-Fetoproteins; D011266:Pregnancy-Associated Plasma Protein-A