Nuchal Translucency Scan Plus

Nuchal Translucency Scan Plus


This is the ideal time to date the pregnancy. The EDD given at this scan is what will be used for the remainder of your pregnancy. During this scan, we will perform some basic anatomy checks to make sure everything is developing as it should at this stage of the pregnancy.
At this stage of the pregnancy, most babies develop normally however some can be affected by a chromosomal defect so during this stage of your pregnancy we can offer you the Combined Test. This test is a non-invasive screening test that will help determine if your baby is at an increased chance of being affected by Down’s syndrome, Edward’s Syndrome, or Patau’s Syndrome. This is done by measuring the length of your baby (CRL), measuring a fluid pocket on the back of your baby’s neck (all babies have this at this stage of pregnancy), and a blood test from your arm. The blood test will look at two hormones (Betta HCG and PAPPA ). We will also need some information about you as the mother. Once we have all of the information our laboratory will be able to calculate an estimation of the mother’s individual chance of this baby being affected by one of these three chromosomal abnormalities. Mothers with a chance of 1:150 or greater may choose to have NIPT or a diagnostic test such as an amniocentesis or CVS.
This can offer you peace of mind about the development of your baby and allow you to make an informed decision in moving forward.
To summarize the purpose of Nuchal scan:

  • Date the pregnancy
  • Identify multiple pregnancies
  • Detect and diagnose major defects
  • Diagnose possible miscarriage
  • Calculate the risk of chromosomal abnormalities such as Downs Syndrome T21, Syndrome Patau’s T13, and Syndrome Edwards T18

The risk is calculated by considering the age of the mother, measurement of two hormones in maternal blood, and the scan findings of nuchal translucency thickness and possible fetal abnormalities detected by the scan.

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A Nuchal Translucency Scan measures the thickness of the fluid collection at the back of your baby’s neck. A thicker than normal Nuchal Translucency is associated with an increased risk of fetal heart problems or many genetic syndromes, such as Down Syndrome, Edwards’ Syndrome and Patau’s syndrome.

This scan is most valuable when performed between 11 weeks and 3 days to 13 weeks and 6 days of pregnancy, and the baby’s head to bottom length measures between 45 mm to 84 mm.

Nuchal Translucency Scans by themselves have an accuracy of 80 % in detecting chromosomal abnormalities, such as Down Syndrome. However, the combination of NT ultrasound scan and maternal blood tests (β-hCG and PAPP-A) improves the accuracy to 94 %.

Apart from determining the risk of having a baby with genetic syndromes, such as Down Syndrome, A Nuchal Translucency Scan can show the baby’s heartbeat and movements, and number of babies. It can also reveal the cause of any concerning symptoms, such as pain or bleeding.

Please note that NT is only a Screening scan, and not a Confirmatory test. Therefore, it cannot confirm nor exclude the presence of a chromosomal abnormality. If your scan results show a high risk of chromosomal diseases, we may recommend you to have further tests, such as NIPT, which is a non-invasive, simple but more accurate blood test, taken from the mother’s arm. Ultimately, your doctor may advise you to have invasive confirmatory tests like chorion villus sampling (CVS) or amniocentesis.

This scan usually takes 20 minutes. However, it may take a bit longer if your baby is not in a favorable position. In this case, we may ask you to take a short stroll and return, or empty your bladder, or have a rescan at a second appointment, which will be offered to you free of charge.

This is a transabdominal ultrasound scan. In order to obtain the best view of the baby, it is recommended to have a full bladder.

How to Find Us

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080 00016345


Private Ultrasound Clinic,
27 Welbeck Street,
London W1G 8 EN

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Dating Scan

Available from 8 – 22 weeks

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NIPT (Harmony) Scan

Available from 10 weeks + 4 days


3ِِD/4D Ultrasound Scan

Available from 22 – 34 weeks

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Gender Scan

Available from 16 – 40 weeks