NT NB Scan in Pregnancy: Importance & Normal Range

What is an NT/NB scan in pregnancy​? 

Between weeks eleven and fourteen of pregnancy, an ultrasound scan known as the Ultrasound Level I NT/NB Scan is conducted. The thickness of the nuchal fold, a fluid-filled region at the back of the infant’s neck, is measured by the scan. It helps in determining whether the infant is susceptible to Down syndrome or other chromosomal issues. The thickness, the mother’s age, and the baby’s gestational age in the womb are used to calculate the risk. Also, if there is more fluid than usual or if the nuchal fold is thicker, it may mean that the baby is more likely to have genetic issues. Herein, additional testing, including amniocentesis, is necessary to confirm abnormal results. 

The scan is usually done transabdominally, but if better images are required, it may be done transvaginally.  To increase accuracy, it is sometimes coupled with a maternal blood test to arrive at what is known as the combination screening test, which is advised for all pregnant women nationwide.

Ideal time to conduct an NT/NB Scan

The NT/NB scan is generally performed between 11-14 weeks of pregnancy. This is an ideal time since the infant has developed enough to clearly check for the nose bone and measure the fluid at the back of the neck. The scan can not be performed earlier than that because the baby might be too small to receive accurate measurements. Also, the scan might not provide accurate results when done later than this. For the most precise and optimal findings, doctors always advise performing the NT NB scan around this time.

Based on the outcomes of the test, patients can get advice from the doctors for the next course of action, such as if additional testing is required or not. This gives the couples more time to plan their pregnancy and make the best decisions possible.

How is an NT/NB scan beneficial?

• Early and timely detection of chromosomal abnormalities: It helps in identifying chromosomal abnormalities, which helps in understanding if any additional tests are required, and to decide on the next course of treatment. 
• Identification of structural concerns: The scan helps in diagnosing structural disorders such as heart-related anomalies, bone deformities, and spina bifida.
• More accurate delivery date estimation: It helps in determining a more specific due date for the birth of your child.
• Evaluation of pregnancy failure risk: This diagnostic test helps in early identification of other issues related to pregnancy failure.
• Finding multiple foetuses: It can identify whether you are carrying more than one child.

Factors affecting the NT NB scan findings

• Position of the infant: It could be challenging to take clear pictures if your child is in an uncomfortable position.
• Sonographer’s skill: The sonographer’s level of experience and their advanced certifications may have an impact on the accuracy of their measurements.
• Other factors: The measurement is affected by the presence or absence of specific markers such as the nasal bone, tricuspid valve flow, and ductus venosus resistance.

NT/NB Normal Range

Less than 3.5 mm of nuchal translucency is regarded as normal. A normal range indicates that your fetus is less likely to have chromosomal or genetic problems. But a measurement higher than this could indicate increased chances of congenital defects. Herein, your doctor might suggest some additional tests, including, Double Marker Test, to validate the results. 

The higher levels of NT, or when the nasal bone is not visible, are not necessarily a sign of trouble always. It simply implies the doctor may recommend additional testing to make sure everything is in order. The NT/NB scan report gives expecting parents and doctors a better understanding and clearer view of the pregnancy. 

Factors affecting the NT/NB scan price

The below-mentioned factors can affect the nuchal translucency scan​ price in India, such as:

• City & Location: The final cost is usually higher at diagnostic centres located in metropolitan areas due to increased overhead.
• Type of Hospital: The charges of multispeciality hospitals and other dedicated diagnostic laboratories may be higher due to high-end equipment and facilities. 
• Technology and Equipment Used: Clinics and hospitals using high-resolution and real-time 4D/5D ultrasound may charge more due to the improved image quality.
• Additional Tests: Additional tests, like dual marker or first-trimester screening blood tests, often increase the overall cost of the package.

Why choose PristynCare for NT/NB Scan in Delhi?

At PristynCare Laboratories, our experts assure you of comprehensive and expert care at every step of your pregnancy journey. Here is why thousands of couples trust us for critical screenings like the NT NB scan.

• Diagnosis Led by Experts

Our scans are conducted by qualified professionals holding expertise in accurately detecting foetal abnormalities beforehand. It helps in accurate and speedy evaluations.

• Innovative Technology

We use cutting-edge ultrasonography technology to provide clean imaging, supported by stringent privacy and hygienic procedures to guarantee a secure and comfortable experience.

• Transparent Pricing

We encourage pricing transparency and strictly adhere to the zero hidden charges policy in order to ensure that the patients receive high-quality care free from any financial uncertainty.

• Holistic Care

We offer comprehensive care, allowing you to choose from diagnostic testing, consultation, and professional advice.

FAQs on NT/NB Scan

• What is NT/NB scan in pregnancy​?

During the first trimester, a fluid-filled region develops behind the fetus’s neck and is called the nuchal translucency.   

• What Is Level 2 Ultrasound in Pregnancy?

Level 2 ultrasound, sometimes referred to as an anomaly scan, is a 20-week ultrasound, or second-trimester ultrasound. It is a kind of prenatal scan which is used to evaluate and assess the anatomical aspects of the developing fetus, placenta, and mother’s pelvis or internal reproductive organs.

• What happens if the NT scan is abnormal?

The normal range of NT scan is between 1.6 and 2.4 mm.  The fetus may have chromosomal problems if the NT is abnormal.

• Is it possible to identify gender using an NT/NB scan?

No, the baby’s gender cannot be determined by an NT/NB scan. The purpose of this scan is to determine the likelihood of chromosomal abnormalities and other congenital disorders.

• Are there any side effects associated with the NT NB scan?

The NT/NB scan is a safe diagnostic method, with no risk factors associated. Several studies have proven it to be safe for both the mother and the unborn child.

• What happens if the findings of the NT NB scan indicate high risk?

Higher values of the scan may not always indicate a health problem with your unborn child. It only suggests a higher risk of specific illnesses. The doctor may advise more tests, including genetic screening or diagnostic procedures, in order to make an informed choice.

• Is a healthy pregnancy guaranteed by the NT/NB scan?

The NT/NB scan does not ensure a safe pregnancy, even though it offers insightful information about your unborn child’s development. It helps in early diagnosis and the decision-making process about the right care, while guaranteeing the health of both mother and child.

• What is NT scan normal range 12 weeks​?

A normal nuchal translucency scan measurement done at twelve weeks usually lies below 3 millimetres. These values can differ slightly depending on the stage of pregnancy and other individual factors.