NT Scan

An NT Scan (Nuchal Translucency Scan) is a delicate ultrasound study performed in the early bloom of pregnancy (between 11 and 14 weeks), where gentle imaging measures the crystal-clear space behind the baby’s neck, known as nuchal translucency, offering a glimpse into the baby’s early development and well-being.

The measurement of NT Scan helps doctors assess the baby’s risk of chromosomal conditions, such as Down syndrome (Trisomy 21), Edwards syndrome (Trisomy 18), and Patau syndrome (Trisomy 13). During the scan, the radiologist also checks the baby’s heartbeat, growth, and early development, ensuring everything is progressing normally.

How reliable is the Nuchal Translucency Test?

NT screenings alone can reveal nearly 70% of Trisomy 21 (Down syndrome) cases, offering an early glimpse into the baby’s genetic well-being. To enhance this insight, many healthcare providers pair the NT ultrasound with specialized blood screenings. When combined, these tests harmonize science and care, raise the accuracy of detection to nearly 95%, and bring greater clarity and reassurance to parents in the earliest weeks of life.

What is a healthy NT measurement during pregnancy?

As your baby grows, the gentle layer of fluid behind the neck naturally increases with gestational age. Different medical guidelines define slightly varied thresholds for when further evaluation may be advised, taking into account both the NT measurement and the baby’s developmental stage. In most pregnancies, an NT reading above 3 millimeters invites a thoughtful discussion with a genetic counselor and consideration of additional tests, ensuring every step forward is guided by care, clarity, and understanding.