Nuchal translucency (NT) is a special ultrasound done at 12 to 14 weeks gestation that looks at and measures the thickness of an area at the back of your baby’s neck. There is a correlation between the nuchal thickness and your baby’s risk of having certain genetic conditions such as Down syndrome.
Maternal blood tests are done at two different occasions in conjunction with the NT test to help make the results more accurate.
The final result, received after all of the tests have been done, will show a probability, your baby’s chance of having Down syndrome, and can therefore be a little confusing to interpret. It is always good to go over the results with your health care provider or a genetic counselor.
If the results are not reassuring and you want to get a more definitive test, talk to your health care provider about getting an amniocentesis or Chorionic Villus Sampling (CVS).