What is an NT Scan? Why is it done?

NT scan stands for Nuchal Translucency scan, which is a type of prenatal ultrasound test. It is usually performed between 11 to 14 weeks of pregnancy and is used to screen for Down syndrome and other chromosomal abnormalities in the fetus.

During the NT scan, a clear fluid accumulation at the back of the fetal neck, called the nuchal translucency, is measured. A larger than normal nuchal translucency measurement can indicate an increased risk of chromosomal abnormalities.

The NT scan is typically combined with a blood test to provide a more accurate assessment of the risk of chromosomal abnormalities. However, it is important to note that an increased risk detected by the NT scan does not necessarily mean that the fetus has a chromosomal abnormality, and further testing, such as amniocentesis, may be needed to confirm the diagnosis.