A Nuchal Translucency Scan (NT scan) is a crucial ultrasound test performed during the first trimester of pregnancy, typically between 11 to 14 weeks. It measures the fluid-filled space at the back of the baby’s neck to assess the risk of chromosomal abnormalities like Down syndrome (trisomy 21), trisomy 18, and trisomy 13.
Indications for Nuchal Translucency Scan:
● Risk of chromosomal abnormalities: NT scan is performed to assess the risk of Down syndrome and other chromosomal abnormalities.
● Advanced maternal age: Women aged 35 or older at the time of pregnancy may be advised to undergo this scan for early detection.
● Previous abnormal screening results: If earlier tests such as first-trimester blood tests or ultrasound suggested an increased risk, the NT scan is recommended.
How Nuchal Translucency Scan Works:
● The procedure is simple and non-invasive. A transabdominal ultrasound is performed, where a gel is applied to the abdomen, and a transducer (ultrasound device) is moved over the skin. The scan measures the nuchal translucency, the fluid-filled space at the back of the baby’s neck.
Normal Range:
● Normal NT values are usually less than 3.5 mm. Larger measurements may indicate an increased risk of chromosomal abnormalities.
Abnormal Test Significance:
● Increased nuchal translucency: Can be associated with Down syndrome, trisomy 18, or heart defects.
● Low risk: A normal scan result generally suggests that the baby does not have an increased risk for chromosomal conditions, but further tests like NIPT (Non-Invasive Prenatal Testing) or amniocentesis might be recommended for confirmation.
Management Based on Results:
● For high-risk pregnancies: Further genetic testing like NIPT or amniocentesis may be suggested.
● For low-risk pregnancies: The pregnancy may proceed without further testing, though regular prenatal care remains essential.
Price in India:
Approx. ₹2,000 – ₹5,000 for Nuchal Translucency Scan.
Frequently Asked Questions
How accurate is the NT scan?
The NT scan is a screening test, not a diagnostic test. It assesses risk, and additional tests may be needed for confirmation.
Does a high NT measurement always mean a problem?
Not necessarily. It’s an indicator of risk, and many babies with increased NT measurements are born healthy.
Disclaimer: An NT scan should be followed up with further diagnostic testing for accurate results and to assess the need for medical interventions.
How HealthPil Can Help:
HealthPil connects you with obstetricians and genetic counselors who can guide you through NT scan results and offer further genetic testing if necessary.