title: [What is the best way to screen for Down syndrome?].
authors.forename: Riitta
authors.initials: R
authors.lastname: Salonen
authors.forename: Ulf-Håkan
authors.initials: UH
authors.lastname: Stenman
mesh_terms: D018997:Chorionic Gonadotropin, beta Subunit, Human / Q000097:blood; D003937:Diagnosis, Differential; D004314:Down Syndrome / Q000175:diagnosis* / Q000000981:diagnostic imaging / Q000517:prevention & control; D026690:Ethics, Clinical; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D008427:Maternal Health Services / Q000379:methods*; D011247:Pregnancy; D011266:Pregnancy-Associated Plasma Protein-A / Q000032:analysis; D012307:Risk Factors; D012680:Sensitivity and Specificity; D014463:Ultrasonography; D000509:alpha-Fetoproteins / Q000032:analysis
chemical_list: D018997:Chorionic Gonadotropin, beta Subunit, Human; D000509:alpha-Fetoproteins; D011266:Pregnancy-Associated Plasma Protein-A