Pronunciation: nu'kal trans-lu'sen-se
Definition: ultrasonographic finding of a single nonseptated lucenty (anechoic area) projecting from the posterior aspect of the fetal neck; measured at menstrual age 11–14 weeks. Increased thickness of this area indicates increased fetal risk for aneuploidy and some nonchromosomal disorders.
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Examples: glitazone, GI cocktail, etc.