NT NB Scan

It seems there might be a slight error in your question. If you are referring to the "NT NB scan," it's possible that you are asking about the "NT scan" or the "Nuchal Translucency (NT) scan" during pregnancy.

Nuchal Translucency (NT) Scan:

The NT scan is a prenatal screening test that is typically performed between the 11th and 14th weeks of pregnancy. It is a type of ultrasound that measures the thickness of the fluid at the back of the baby's neck (the nuchal fold). The test is often done in conjunction with a blood test, which together is known as the first-trimester combined screening.

Key points about the NT scan:

1. Purpose:

   • The NT scan helps assess the risk of chromosomal abnormalities, particularly Down syndrome (Trisomy 21) and other chromosomal conditions.

2. Procedure:

   • A specialized ultrasound is used to measure the thickness of the nuchal fold, which is typically larger in babies with certain chromosomal abnormalities.
   • The results of the NT scan are combined with maternal age and blood test results to estimate the risk of chromosomal abnormalities.

3. Results:

   • The results are given as a likelihood or risk factor, indicating whether further diagnostic testing, such as amniocentesis or chorionic villus sampling (CVS), may be recommended.

4. Non-Invasive:

   • The NT scan is a non-invasive procedure and does not pose a risk to the pregnancy.

It's essential to discuss the results and any concerns with your healthcare provider. It's important to note that while the NT scan provides valuable information, it is a screening test, not a diagnostic one. If the results indicate an increased risk, further diagnostic testing may be recommended for confirmation.

If you had a specific term or context in mind with "NT NB scan," and it's different from the Nuchal Translucency scan mentioned above, please provide additional details for a more accurate response.