Abstract:Objective: To examine the sensitivity and specificity of different thresholds of nuchal translucency in diagnosis of chromosomal defects. Study Design: This is a longitudinal study of pregnant women have first trimester screening and ultrasound in center of diagnostic antenatal of national hospital of obstetrics and gynecology. A follow-up was made to identify, in all singleton pregnancies in both group of which fetal karyotyping was made and group of normal fetuses. The threshold for nuchal translucency was d… Show more
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