NT NB scan in pregnancy is an important ultrasound. It is generally performed in the first trimester to examine the baby’s development. It helps to measure the Nuchal Translucency (NT), which is the fluid-filled space at the back of the baby’s neck. This ultrasound also checks for the Nasal Bone (NB). This screening helps to find the risk of chromosomal abnormalities early in pregnancy. In this blog, we will give detailed information about why the NT NB scan is done, what the normal range should be, and other important things you need to know.
At RISAA IVF, Dr. Rita Bakshi (Obstetrician & Gynaecologist), understands the emotional and medical importance of early pregnancy scans. Dr. Bakshi and her team have helped many couples in their pregnancy journey. Through this blog, we will simplify the NT NB scan process so that expecting parents can know better about their journey.
What is NT NB Scan in Pregnancy?
The NT NB scan in pregnancy is a special ultrasound which is done in the early months of pregnancy. It is usually done between 11 and 14 weeks. In this scan, doctors check how much clear fluid is collected at the back of the baby’s neck. This fluid is called Nuchal Translucency (NT). It also checks whether the baby’s nose bone (Nasal Bone or NB) is visible. Both of these checks are important because they can give early signs about the baby’s health and overall development.
If the fluid at the back of the neck is thicker than normal or if the nose bone is missing then it might mean there is a higher chance of problems like Down syndrome or other genetic issues. But it’s important to remember that this scan does not confirm if there is a problem. It only tells if the chances are higher, and then doctors may suggest more tests if needed.
The NT NB scan is safe, simple, and does not hurt the mother or the baby. It helps parents and doctors to plan better for a healthy pregnancy by picking up important signs at an early stage. That’s why this scan is recommended for almost every pregnant woman.
Why is the NT NB Scan is Done?
The NT NB scan is done to check if the baby might have any genetic problems, like Down syndrome. It is usually done very early in the pregnancy. It helps the doctors to find out if the baby is growing well and if there are any warning signs that need more testing.
The NT NB scan full form is Nuchal Translucency and Nasal Bone scan. In this scan, the doctor measures the fluid behind the baby’s neck (NT) and also checks if the baby’s nose bone (NB) is clearly visible. Extra fluid or a missing nose bone can sometimes mean a higher risk of genetic problems.
By doing this scan early, parents can get a better idea about their baby’s health. If anything unusual is found then the doctors can guide the parents about the next steps like further testing. This helps the families to have time to understand everything and make the best decisions for their pregnancy.
When is NT NB Scan Done?
The NT NB scan is usually done between 11 weeks to 14 weeks of pregnancy. This is the best time because the baby is developed enough to measure the fluid at the back of the neck and check for the nose bone clearly. The scan cannot be done too early because the baby may be too small to get the right measurements. Additionally, if it is done too late then the results may not be accurate. That’s why doctors always suggest doing the NT NB scan during this time frame for the best and most accurate results.
What is the NT NB Scan Normal Range?
The NT NB scan in pregnancy depends on how far along you are. The NT NB scan in pregnancy normal range is important to check the baby’s health for most pregnancies between 11 to 14 weeks.
For the NT (Nuchal Translucency) measurement:
- If you are 12 weeks pregnant, the NT scan normal range at 12 weeks should usually be between 1.6 mm to 2.4 mm.
- In general, the NT should be less than 3.5 mm at this stage of pregnancy.
- A smaller NT measurement means the baby is less likely to have chromosomal problems.
For the NB (Nasal Bone):
- It is considered normal if the nasal bone is clearly seen during the scan.
- If the nasal bone is missing or not formed properly then it can sometimes be a soft sign of genetic conditions like Down syndrome.
Even if the NT is slightly higher or the nasal bone is not seen then it doesn’t always mean there is a problem. It just means the doctor might suggest more tests to be sure everything is okay. The NT NB scan report helps the doctors and the parents to have a better picture of the pregnancy.
How NT NB Scan is Done?
The NT NB scan is done just like a normal ultrasound. Your doctor will ask you to lie down and will put a special gel on your lower belly. Then, they will move a small device called a probe over your belly to get clear pictures of the baby. They will carefully measure the thickness of the fluid at the back of the baby’s neck (NT) and check if the nose bone (NB) is visible.
Click here to know more about Pregnancy scan list in Hindi
The whole scan usually takes about 20 to 30 minutes. It is completely safe, painless, and there is no risk to you or your baby. Sometimes, if the baby is not in the right position then you may be asked to walk around or come back after some time.
What Happens If You Miss the NT NB Scan Timing?
If you miss the NT NB scan timing (after 14 weeks) then it becomes difficult to measure the fluid at the back of the baby’s neck because it starts disappearing as the baby grows. This means doctors cannot get the important information that is needed to check the risk of genetic problems through this scan.
However, if the NT NB scan is missed then the doctors may suggest other tests. It can include a second-trimester anomaly scan or a blood test to check the baby’s health. However, these tests are different and may not give the same information that the NT NB scan provides at an early stage.
NT NB Scan Price
The cost of an NT NB scan can be different depending on the hospital, clinic, and city. On average, the price of an NT NB scan in India is between ₹1500 to ₹4000. Some places may charge a little more if they use very advanced machines or if the scan is done by a senior specialist. It’s best to ask the clinic about the cost before booking your appointment. There are some centers that also offer packages that include other pregnancy tests along with the NT NB scan.
Final Words
The NT NB scan in pregnancy is an important test that helps parents to understand more about their baby’s health. In this blog, we’ve covered everything you need to know about the NT NB scan. We have discussed when it’s done, how it’s performed, and more. It will help the parents and the doctors to plan for the rest of the pregnancy if needed.
At RISAA IVF, Dr. Rita Bakshi, a senior Obstetrician and Gynecologist, has guided many women through healthy pregnancies with her expert care. Her team is always ready to provide support and advice to ensure the well-being of both mother and baby. For more information or any concerns regarding pregnancy scans, feel free to contact us at 95555 44421/22/23 or email doctor@risaaivf.com.
Frequently Asked Questions (FAQs)
NT NB scan in pregnancy which week?
The NT NB scan is usually done between 11 and 14 weeks of pregnancy. This is the best time to measure the fluid at the back of the baby’s neck and check for the nose bone.
What to see in an NT NB scan?
In an NT NB scan, the doctor measures the Nuchal Translucency (NT), which is the fluid behind the baby’s neck, and checks if the Nasal Bone (NB) is visible. These measurements help assess the risk of genetic conditions like Down syndrome.
Does NT scan detect gender?
No, the NT scan does not determine the baby’s gender. It is focused on checking the baby’s health, especially the risk of chromosomal abnormalities.
In which week is baby gender developed?
The baby’s gender is usually developed by around 7-9 weeks of pregnancy, but it is not typically visible in ultrasounds until around 18-20 weeks during the anatomy scan.
Is NT scan 100% accurate?
No, the NT scan is not 100% accurate. It only gives a risk assessment based on measurements and does not confirm a diagnosis. Further tests may be needed if any issues are suspected