An N.T. Scan, also known as the Nuchal Translucency Scan, is an important ultrasound test performed during the first trimester of pregnancy, typically between 11 and 14 weeks. This scan is a safe, non-invasive procedure that helps assess the risk of chromosomal abnormalities in the developing baby, such as Down syndrome (Trisomy 21), Edwards syndrome (Trisomy 18), and Patau syndrome (Trisomy 13).During the N.T. Scan, the doctor measures the thickness of the fluid collection at the back of the baby’s neck, known as the nuchal translucency. A thicker-than-normal nuchal translucency could indicate an increased risk of chromosomal abnormalities or heart defects. However, it’s important to understand that the N.T. Scan doesn’t provide a definitive diagnosis; it only helps in assessing the risk, and further tests may be recommended if the results show higher risk.