NT Scan in Dubai

An NT scan (nuchal translucency scan) is a specialised ultrasound performed between 11 and 14 weeks of pregnancy to measure the fluid-filled space at the back of your baby's neck, known as the nuchal translucency. This measurement, combined with your age and blood test results, provides a personalised risk assessment for chromosomal conditions such as Down syndrome (Trisomy 21), Edwards syndrome (Trisomy 18), and Patau syndrome (Trisomy 13). The scan also confirms viability, checks the heartbeat, verifies dating, and performs an early anatomical assessment of your baby.

The NT scan must be performed between 11 weeks and 3 days and 13 weeks and 6 days of pregnancy, when the baby's crown-rump length measures between 45mm and 84mm. This specific window is critical because the nuchal translucency space changes naturally with gestational age. Before 11 weeks, the baby is too small for accurate measurement. After 14 weeks, the lymphatic system begins to develop and the fluid is reabsorbed, making the measurement unreliable. We recommend booking your NT scan appointment as early as possible to secure a slot within this narrow window.

Yes, the NT scan uses standard diagnostic ultrasound, which has been used safely in pregnancy for decades. Ultrasound uses high-frequency sound waves rather than ionizing radiation, making it fundamentally different from X-rays or CT scans. Major medical organizations worldwide, including the World Health Organization and the International Society of Ultrasound in Obstetrics and Gynecology (ISUOG), endorse ultrasound as a safe and essential tool for prenatal screening. Our sonographers follow established protocols to ensure scans are performed efficiently and within recommended guidelines.

A normal nuchal translucency measurement is generally less than 3.5mm at 11 to 14 weeks gestation, though the expected range increases slightly with gestational age. The average NT at 12 weeks is approximately 1.5 to 2.0mm. An increased NT measurement does not mean your baby has a chromosomal abnormality, but it does indicate a statistically higher risk that warrants further evaluation. Your final risk is calculated by combining the NT measurement with your age, blood markers (free beta-hCG and PAPP-A), and other ultrasound findings such as nasal bone presence.

An increased NT measurement means there is a higher statistical risk of chromosomal abnormality, but the majority of babies with slightly elevated NT measurements are completely healthy. If your combined screening shows a higher risk, your obstetrician will discuss further testing options including NIPT (non-invasive prenatal testing), which is a blood test with very high accuracy, or diagnostic procedures such as chorionic villus sampling (CVS) or amniocentesis that provide definitive chromosomal analysis. Our team provides clear, supportive guidance to help you make informed decisions about next steps.

Combined first-trimester screening includes the NT ultrasound measurement plus a blood test measuring two markers: free beta-hCG (human chorionic gonadotropin) and PAPP-A (pregnancy-associated plasma protein A). These three components are combined with your age to calculate a personalised risk for Down syndrome and other trisomies. This combined approach detects approximately 90 percent of Down syndrome pregnancies with a false-positive rate of about 5 percent. Contact us for NT scan cost information and transparent pricing. The blood test is typically done during the same visit as the NT scan, and combined results are available within 3 to 5 days.

While the NT scan provides accurate dating information by measuring the baby's crown-rump length, its primary purpose is different from a dating scan. A dating scan is performed earlier, usually between 6 and 10 weeks, to confirm viability and establish the due date. The NT scan is specifically designed for first-trimester screening between 11 and 14 weeks. If you have not had an earlier dating scan, the NT scan will serve both purposes by confirming dates and performing the nuchal translucency assessment in one appointment.

No, the NT scan is a screening test, not a diagnostic test. It provides a risk assessment (for example, 1 in 5,000 or 1 in 150) rather than a definitive yes-or-no answer. A screening result is categorised as low-risk or high-risk based on established thresholds. If the screening shows a higher risk, definitive diagnosis requires further testing: either NIPT (which is highly accurate but still technically a screening test) or diagnostic procedures such as CVS or amniocentesis, which analyse the baby's actual chromosomes and provide a definitive answer.