title: Improved methodology for evaluating nuchal thickness in the second trimester.
authors.forename: Alan V
authors.initials: AV
authors.lastname: Cadkin
authors.forename: Eugene
authors.initials: E
authors.lastname: Pergament
mesh_terms: D004314:Down Syndrome / Q000000981:diagnostic imaging; D005260:Female; D005865:Gestational Age; D006801:Humans; D009333:Neck / Q000000981:diagnostic imaging* / Q000196:embryology*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D016216:Ultrasonography, Prenatal / Q000379:methods*