title: The utility of detailed first trimester ultrasound examination in abnormal fetal nuchal translucency.
mesh_terms: D002869:Chromosome Aberrations / Q000196:embryology*; D004314:Down Syndrome / Q000196:embryology / Q000648:ultrastructure; D005260:Female; D005865:Gestational Age; D006801:Humans; D007621:Karyotyping; D048208:Nuchal Translucency Measurement / Q000379:methods*; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D012680:Sensitivity and Specificity; D014314:Trisomy; D016216:Ultrasonography, Prenatal