NTNB Scan (11- 13+6 weeks)
What is the NT NB scan?
A nuchal or nuchal translucency (NT) scan is a sonographic prenatal screening ultrasound to detect chromosomal abnormalities such as Down syndrome in a fetus. The nasal bone (NB) test is a part of it.
There is a fluid-filled space behind the fetus’s neck called the nuchal translucency or the nuchal fold. The scan measures the translucency and the thickness of the fold. The test also checks if the fetus has developed a nasal bone.
When is the scan performed?
The scan is performed during the first trimester of the pregnancy mostly between 11 to 13 weeks as the clear space at the back of the baby’s neck starts disappearing after 15 weeks.
Why is NT NB scan important?
- Detecting chromosomal abnormalities like down syndrome
- Detecting structural abnormalities like spina bifida
- Guessing a more accurate delivery date
- Early diagnosis of any pregnancy failure risks
- Diagnosis of multiple foetuses (if any)
Generally, the doctors would recommend NT NB Scan in Jaipur along with the blood test during the first trimester of the pregnancy. The test is not at all painful but a slight pressure can be felt on the abdomen to get a clear picture. Dr. Mayuri Kothiwala says that the test is important if there is a need to measure the size of the clear tissue, called the Nuchal Translucency, at the back of your baby’s neck.