what is a nuchal translucency ultrasound
A nuchal translucency ultrasound (commonly called a ânuchal scanâ or âNT scanâ) is an ultrasound performed between 11.5 and 13 weeks 6 days gestation. It is usually part of an assessment called combined first trimester screening.he best time to have the blood test is 10 weeks gestation, however it can be performed at any time between 10 and 13 weeks 6 days gestation. It is ideal (but not essential) to have the blood test results available at your nuchal translucency ultrasound.