NTNB scan in rohini C-8/193 sector 8 rohini Delhi 110085, 7827070020, 9811552279 The NT/NB scan, also known as the nuchal translucency and nasal bone scan, is a prenatal ultrasound performed between 11 and 14 weeks of pregnancy. It assesses the risk of certain chromosomal abnormalities, specifically Down syndrome, Edwards syndrome, and Patau syndrome. The scan measures the fluid-filled space at the back of the baby's neck (nuchal translucency) and checks for the presence and development of the nasal bone. Here's a more detailed explanation: Purpose: The NT/NB scan screens for chromosomal abnormalities by measuring the nuchal translucency (NT) and evaluating the nasal bone (NB). Timing: It's typically performed between 11 and 14 weeks of pregnancy, as this is when the fetus is developed enough for accurate measurements. What it measures: NT (Nuchal Translucency): This measures the fluid-filled space at the back of the baby's neck. An increased NT measurement can indicate an elevated risk of chromosomal abnormalities. NB (Nasal Bone): This assesses the presence and development of the nasal bone. The absence or underdevelopment of the nasal bone can also be a marker for chromosomal abnormalities. Chromosomal Abnormalities: The scan helps assess the risk of conditions like Down syndrome (Trisomy 21), Edwards syndrome (Trisomy 18), and Patau syndrome (Trisomy 13). Screening Tool: It's important to note that the NT/NB scan is a screening test, not a diagnostic test. It provides information about the risk of these conditions but doesn't confirm a diagnosis.