title: What is the role of fetal nasal bone examination in the assessment of risk for trisomy 21 in clinical practice?
authors.forename: Yves
authors.initials: Y
authors.lastname: Ville
mesh_terms: D003362:Cost-Benefit Analysis; D004314:Down Syndrome / Q000000981:diagnostic imaging* / Q000453:epidemiology*; D005260:Female; D006801:Humans; D009295:Nasal Bone / Q000000981:diagnostic imaging* / Q000196:embryology*; D048208:Nuchal Translucency Measurement; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D018570:Risk Assessment; D016216:Ultrasonography, Prenatal / Q000191:economics