NT NB Scan – Procedure, Price and Benefits

by | Mar 16, 2023 | Pregnancy

What is the NT NB Scan?

The (Nuchal Translucency Nasal Bone) NT NB scan is a specialized ultrasound examination used to screen for certain chromosomal abnormalities in a developing fetus. During this scan, the thickness of the fluid-filled space at the back of the fetus’s neck, known as the nuchal translucency, is measured. Additionally, the scan can detect the presence or absence of the fetal nasal bone, which is another indicator of chromosomal abnormalities. This scan is usually performed between the 11th and 13th weeks of pregnancy, and it is non-invasive and does not pose any risk to the developing fetus or the mother.

What is NT NB Scan

What is NT NB Scan

Should I have an NT NB Scan?

Whether or not to have an NT NB scan is a personal decision that should be made after consulting with a healthcare provider. The scan is not mandatory, but it is recommended for women who are at a higher risk of having a baby with a chromosomal abnormality. This includes women who are 35 years old or older, women who have a family history of chromosomal abnormalities, and women who have previously had a child with a chromosomal abnormality. Additionally, the scan can provide reassurance to expectant parents who may be concerned about the health of their developing fetus.

 

When is an NT NB Scan Done?

The NT NB scan is typically done between the 11th and 13th weeks of pregnancy. This is because the fetus is still small enough to get accurate measurements, and the nuchal translucency fluid is at its maximum thickness during this time. Additionally, the nasal bone is clearly visible at this stage of development. It is important to note that the scan is not done to diagnose any abnormalities, but rather to identify pregnancies that may be at a higher risk of chromosomal abnormalities. If the results of the scan indicate a higher risk, further testing such as chorionic villus sampling (CVS) or amniocentesis may be recommended.

The NT NB scan is a specialized ultrasound examination that is used to screen for certain chromosomal abnormalities in a developing fetus. Whether or not to have the scan is a personal decision that should be made after consulting with a healthcare provider. The scan is typically done between the 11th and 13th weeks of pregnancy and is recommended for women who are at a higher risk of having a baby with a chromosomal abnormality. While the scan does not diagnose any abnormalities, it can provide reassurance to expectant parents and identify pregnancies that may require further testing.

 

What’s the Purpose of an NT NB Scan?

The purpose of an NT NB (Nuchal Translucency Nasal Bone) scan is to screen for certain chromosomal abnormalities in a developing fetus. Specifically, the scan measures the thickness of the nuchal translucency, which is the fluid-filled space at the back of the fetus’s neck. This measurement, along with the presence or absence of the fetal nasal bone, can indicate whether the fetus is at a higher risk of chromosomal abnormalities such as Down syndrome, Trisomy 13, or Trisomy 18. The scan is non-invasive and does not pose any risk to the developing fetus or the mother.

Also Read: Dual Marker Test

How is the NT NB Scan Performed?

The NT NB scan is performed using ultrasound technology. The procedure usually takes around 30 minutes and is performed by a trained sonographer or ultrasound technician. During the scan, the woman lies on her back with her abdomen exposed, and a gel is applied to the skin over the uterus. The technician then uses a transducer, which is a handheld device that emits high-frequency sound waves, to create an image of the developing fetus on a screen.

The technician measures the thickness of the nuchal translucency, which is the fluid-filled space at the back of the fetus’s neck, using calipers on the screen. This measurement is then compared to the normal range for fetuses of the same gestational age. The presence or absence of the fetal nasal bone is also checked, as its absence may indicate a higher risk of chromosomal abnormalities.

After the scan, the results are usually available within a few days. If the results indicate a higher risk of chromosomal abnormalities, the woman may be offered further testing such as chorionic villus sampling (CVS) or amniocentesis to confirm the diagnosis.

 

Who Performs an NT NB Scan?

An NT NB scan is typically performed by a trained sonographer or ultrasound technician who has received specialized training in performing this type of scan. In some cases, the scan may be performed by a radiologist or obstetrician-gynaecologist (OB-GYN). It’s important to choose a reputable healthcare provider who has experience in performing and interpreting NT NB scans to ensure accurate results.

The purpose of an NT NB scan is to screen for certain chromosomal abnormalities in a developing fetus, using measurements of the nuchal translucency and the presence or absence of the fetal nasal bone. The scan is performed using ultrasound technology by a trained sonographer, ultrasound technician, radiologist, or OB-GYN. The procedure is non-invasive and does not pose any risk to the developing fetus or the mother. If the results of the scan indicate a higher risk of chromosomal abnormalities, further testing may be recommended to confirm the diagnosis.

Also Read: How to Increase AMH Levels Naturally

How to Prepare for an NT NB Scan?

Preparing for an NT NB (Nuchal Translucency Nasal Bone) scan is relatively simple. Here are some tips to help you prepare:

  • Schedule the scan: You will need to schedule an appointment for the scan, typically between 11 and 14 weeks of pregnancy. Check with your healthcare provider to ensure that the scan is available at their facility.
  • Drink water: It’s important to drink plenty of water before the scan to ensure that your bladder is full. This will make it easier for the technician to obtain clear images of the developing fetus.
  • Wear comfortable clothing: Wear comfortable, loose-fitting clothing that will allow easy access to your abdomen.
  • Bring a support person: You may want to bring relatives with you to the scan, as it can be an emotional experience.
  • Follow any specific instructions: Your healthcare provider may provide you with specific instructions to follow before the scan, such as avoiding certain foods or medications.

 

Benefits of NT NB Scan:

The NT NB scan offers several benefits for both the developing fetus and the mother:

  • Early detection of chromosomal abnormalities: The scan can detect certain chromosomal abnormalities early in pregnancy, which allows for earlier intervention and treatment.
  • Non-invasive: The NT NB scan is a non-invasive procedure that does not pose any risk to the developing fetus or the mother.
  • Low false positive rate: The scan has a low false positive rate, which means that it is highly accurate in detecting chromosomal abnormalities.
  • Peace of mind: For many expectant parents, the scan offers peace of mind, as it provides information about the health and development of the fetus.

Also Read: Triple Marker Test 

Risks of NT NB Scan:

While the NT NB scan is generally considered safe, there are some potential risks ike:

  • False positive results: While the NT NB scan has a low false positive rate, there is still a risk of receiving a false positive result, which can cause unnecessary stress and anxiety.
  • Need for further testing: If the results of the scan indicate a higher risk of chromosomal abnormalities, further testing may be recommended, which can be invasive and carry some risk.
  • Limited information: The NT NB scan is not able to detect all chromosomal abnormalities and other conditions that may be present in the developing fetus.
  • Inconclusive results: In some cases, the results of the scan may be inconclusive, which may require further testing or monitoring.

Preparing for an NT NB scan is relatively simple and involves scheduling the scan, drinking water, wearing comfortable clothing, bringing a support person, and following any specific instructions provided by your healthcare provider. The NT NB scan offers several benefits, including early detection of chromosomal abnormalities, non-invasiveness, a low false positive rate, and peace of mind. However, there are also some potential risks to be aware of, including false positive results, the need for further testing, limited information, and inconclusive results. It’s important to discuss the benefits and risks of the NT NB scan with your healthcare provider to determine if it’s right for you.

Also Read: Follicular Study

NT NB Scan Price in India:

In India, the cost of an NT NB (Nuchal Translucency Nasal Bone) scan can vary depending on the location and the facility where the scan is performed. On average, the cost of the scan ranges from INR 2,000 to INR 4,000. However, the cost may be higher in some private healthcare facilities or hospitals.

It’s important to check with your healthcare provider or the facility where you plan to have the scan performed to get an accurate estimate of the cost.

Also Read: What is Egg Freezing Cost in India?

 

NT NB Scan Results

NT NB Scan Results

NT NB Scan Results

The results of the NT NB scan are typically given in the form of a risk score, which is calculated based on several factors, including the thickness of the nuchal fold (a layer of fluid at the back of the fetus’s neck), the presence or absence of the fetal nasal bone, and the mother’s age.

A risk score of 1 in 100 or higher indicates a higher risk of chromosomal abnormalities, such as Down syndrome. However, it’s important to note that a high-risk score does not necessarily mean that the fetus has a chromosomal abnormality, and further testing may be required to confirm the diagnosis.

If the results of the NT NB scan are normal, it can provide reassurance to expectant parents that the fetus is developing normally. However, it’s important to note that the test is not able to detect all chromosomal abnormalities or other conditions that may be present in the developing fetus.

In conclusion, the cost of an NT NB scan in India can vary depending on the location and the facility where the scan is performed. The accuracy of the test depends on several factors, and while it has a high detection rate for chromosomal abnormalities, it’s important to note that it’s not 100% accurate and can produce false-positive or false-negative results. The results of the NT NB scan are typically given in the form of a risk score, and if the results indicate a higher risk of chromosomal abnormalities, further testing may be required to confirm the diagnosis.

Accuracy of the NT NB Scan in Pregnancy Test Result:

The NT NB scan is a screening test that is used to assess the risk of certain chromosomal abnormalities in the developing fetus. The accuracy of the test depends on several factors, including the quality of the ultrasound machine, the skill of the technician performing the scan, and the gestational age of the fetus.

On average, the NT NB scan has a detection rate of 70% to 90% for Down syndrome and other chromosomal abnormalities. However, it’s important to note that the test is not 100% accurate and can produce false-positive or false-negative results.

If the results of the NT NB scan indicate a higher risk of chromosomal abnormalities, further testing may be recommended to confirm the diagnosis. These tests may include chorionic villus sampling (CVS) or amniocentesis, which are invasive procedures that carry a small risk of complications.

Also Read: How Much Does HSG Test Price/Cost in 2023?

 

FAQ:

Q: What are NT and NB scans in pregnancy?

A: NT (Nuchal Translucency) and NB (Nasal Bone) scans are prenatal screening tests that are performed to assess the risk of certain chromosomal abnormalities in the developing fetus, such as Down syndrome.

Q: What is a normal NT NB scan?

A: A normal NT NB scan is one in which the nuchal fold measurement and nasal bone length fall within the normal range for the gestational age of the fetus. The risk of chromosomal abnormalities is considered to be low in a normal NT NB scan.

Q: In which week is the NT NB scan done?

A: The NT NB scan is typically done between 11 and 14 weeks of pregnancy.

Q: What is NT NB scan in pregnancy?

A: The NT NB scan in pregnancy is a non-invasive screening test that is used to assess the risk of chromosomal abnormalities in the developing fetus, such as Down syndrome.

Q: What is NT scan and NB scan?

A: The NT scan is a prenatal screening test that measures the thickness of the nuchal fold at the back of the fetus’s neck, while the NB scan assesses the presence or absence of the fetal nasal bone. Both tests are used together to assess the risk of chromosomal abnormalities in the developing fetus.

Q: What is normal NT NB scan?

A: A normal NT NB scan is one in which the nuchal fold measurement and nasal bone length fall within the normal range for the gestational age of the fetus. The risk of chromosomal abnormalities is considered to be low in a normal NT NB scan.

Q: Can NT scan show gender?

A: The NT scan is not designed to show the gender of the fetus. However, gender may be determined by other prenatal tests, such as a blood test or an ultrasound.

Q: Does NT detect gender?

A: No, the NT scan is not designed to detect the gender of the fetus.

Q: What if NT scan is positive?

A: If the NT scan is positive, it means that there is an increased risk of chromosomal abnormalities in the developing fetus. Further diagnostic testing, such as chorionic villus sampling or amniocentesis, may be recommended to confirm the diagnosis.

Q: Is NT scan good for the baby?

A: The NT scan is a non-invasive screening test that is generally considered safe for both the mother and the developing fetus. It can provide valuable information about the risk of chromosomal abnormalities in the fetus, which can help with early intervention and planning. However, it’s important to note that the test is not 100% accurate and can produce false-positive or false-negative results.

Q: How do I prepare for NT NB scan?

A: Generally, no special preparation is required for an NT NB scan. However, it’s recommended to wear comfortable and loose-fitting clothing, and to have a full bladder for the scan.

Q: Is NT NB scan done empty stomach?

A: No, an NT NB scan is not typically done on an empty stomach. However, your healthcare provider may give you specific instructions regarding eating and drinking before the scan.

Q: Why NT NB scan is done?

A: An NT NB scan is done to assess the risk of chromosomal abnormalities in the developing fetus, such as Down syndrome. The scan measures the thickness of the nuchal fold at the back of the fetus’s neck and assesses the presence or absence of the fetal nasal bone.

Q: What is a good NT at 12 weeks?

A: A good NT measurement at 12 weeks is generally considered to be less than 3.5mm. However, the normal range for NT measurement can vary depending on various factors, such as maternal age and weight.

Q: How much NT thickness is normal?

A: The normal range for NT thickness can vary depending on various factors, such as maternal age and weight. In general, a NT measurement of less than 3.5mm is considered to be within the normal range.

Q: What are normal NT scan results at 12 weeks?

A: The normal range for NT scan results can vary depending on various factors, such as maternal age and weight. In general, a NT measurement of less than 3.5mm is considered to be within the normal range.

Q: What is the normal range of NT at 12 weeks?

A: The normal range for NT measurement at 12 weeks can vary depending on various factors, such as maternal age and weight. In general, a NT measurement of less than 3.5mm is considered to be within the normal range.

Q: Is NT NB scan necessary?

A: The NT NB scan is not mandatory, but it is recommended as a non-invasive screening test for assessing the risk of chromosomal abnormalities in the developing fetus.

Q: What is normal range for NB scan at 13 weeks?

A: The normal range for NB (Nasal Bone) scan at 13 weeks can vary depending on various factors, such as maternal age and weight. In general, the presence of a visible nasal bone on the scan is considered to be within the normal range.

Q: Is NT scan same as 12 week scan?

A: The NT scan is typically done as part of the 12 week scan, which is also known as the dating scan. However, the 12 week scan can involve additional assessments, such as measuring the fetal heartbeat and checking for any physical abnormalities.

Q: What is a good NT scan result?

A: A good NT scan result is one in which the nuchal fold measurement falls within the normal range for the gestational age of the fetus. In general, a NT measurement of less than 3.5mm is considered to be within the normal range.

Q: Is NT 1.6 normal at 12 weeks?

A: Yes, a NT measurement of 1.6mm at 12 weeks is considered to be within the normal range. However, it’s important to note that the normal range for NT measurement can vary depending on various factors, such as maternal age and weight.

Q: What is NT Mom normal range?

A: The NT Mom normal range refers to the normal range of nuchal translucency (NT) measurement in pregnant women. The normal range varies depending on the gestational age, but typically ranges from 1.0mm to 2.5mm.

Q: How do I prepare for NT NB scan?

A: To prepare for an NT NB scan, it is recommended to drink plenty of water before the scan to ensure a full bladder, as this can help with the visibility of the fetus. It is also advised to wear loose-fitting and comfortable clothing.

Q: Should I worry about NT scan?

A: It is normal to have some concerns about the NT scan, but it is a routine test performed to assess the risk of certain chromosomal abnormalities in the fetus. Most NT scans are normal, and even if the result indicates a higher risk, it does not necessarily mean that the fetus has a chromosomal abnormality.

Q: Why NT NB scan is done?

A: The NT NB scan is done to measure the nuchal translucency (NT) in the fetus, which is the fluid-filled space behind the baby’s neck. This measurement is used to assess the risk of certain chromosomal abnormalities in the fetus, such as Down syndrome and other genetic disorders.

Q: Can you tell gender at 13 week NT scan?

A: It is possible to determine the gender of the fetus during a 13-week NT scan, but it is not the main purpose of the scan. The primary goal of the NT scan is to assess the risk of chromosomal abnormalities, while gender determination is a secondary benefit.

Q: What is the CRL of baby girl at 13 weeks?

A: The crown-rump length (CRL) of a baby girl at 13 weeks is approximately 7.4cm, but this can vary depending on individual growth and development.

Q: Can you see abnormalities at 13 week scan?

A: It is possible to detect some structural abnormalities during a 13-week scan, but the detection rate is not as high as in later scans. The NT scan primarily focuses on measuring the NT and assessing the risk of chromosomal abnormalities, but some structural abnormalities may also be visible.

Q: Which month is best for NT scan?

A: The NT scan is typically performed between 11 and 13 weeks of pregnancy, with the optimal time being around 12 weeks. This is because the fetus is developed enough to provide accurate measurements, but not too developed to hinder visibility.

Q: Is Double marker and NT scan same?

A: The double marker test and the NT scan are not the same, but they are often performed together as part of prenatal screening. The double marker test involves a blood test to measure the levels of two hormones in the mother’s blood, while the NT scan measures the thickness of the nuchal translucency in the fetus.

Q: When do you know gender?

A: The gender of the fetus can typically be determined during an ultrasound scan around 18 to 20 weeks of pregnancy, but this can vary depending on various factors such as the position of the fetus and the quality of the ultrasound image.

 

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    Dr Mona Dahiya

    Dr Mona Dahiya

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    Dr Mona Dahiya has performed over 5,000+ IVF cycles and is considered a global expert in IVF, ICSI, IUI and male fertility treatment. She is an eminent writer on Infertility Treatment and has over 100 Publications in both International and National Journals. Dr Mona Dahiya has immensely contributed to the field of infertility through her Research and articles.

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