title: The role of ultrasound in screening for Down syndrome.
authors: Swedish Hospital Medical Center, Seattle, WA 98104.
authors: R G
authors: RG
authors: Resta
authors: D
authors: D
authors: Nyberg
mesh_terms: D004314:Down Syndrome / Q000000981:diagnostic imaging* / Q000453:epidemiology; D005069:Evaluation Studies as Topic; D005260:Female; D006801:Humans; D008403:Mass Screening / Q000379:methods*; D011247:Pregnancy; D012680:Sensitivity and Specificity; D016216:Ultrasonography, Prenatal / Q000592:standards*