Radiology Terms

Nuchal Translucency

What is Nuchal Translucency?

A nuchal translucency scan is a screening ultrasound test done during pregnancy. It measures the amount of fluid behind the neck of a developing fetus in the first trimester. 

Nuchal translucency is used to estimate the risk of Down Syndrome and other conditions in the developing fetus. While this scan is optional, it’s usually performed between 11 and 13 weeks of gestation and is sometimes done along with a blood test screening for greater accuracy.