What is the Nuchal Scan?
The Nuchal Translucency (NT) scan is a crucial early pregnancy screening performed between 11 weeks + 3 days and 13 weeks + 6 day. This non-invasive ultrasound measures the fluid-filled space at the back of your baby’s neck. An increased NT measurement can be associated with chromosomal conditions such as Down’s syndrome (trisomy 21), Edwards’ syndrome (trisomy 18), and Patau’s syndrome (trisomy 13).
Typically conducted transabdominally, the scan might be performed transvaginally if clearer images are needed. It’s often combined with a maternal blood test to enhance accuracy, forming what’s known as the combined screening test, which is nationally recommended too all pregnant women.
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What are the aims of the nuchal scan?
The primary goal of the nuchal scan is to assess the risk of chromosomal abnormalities in your baby. By measuring the nuchal translucency and analysing maternal blood markers, healthcare providers can estimate the likelihood of conditions like Down’s syndrome. It’s important to note that this is a screening test, not a diagnostic one, meaning it assesses risk but doesn’t confirm a diagnosis.
What if the nuchal translucency is increased/abnormal for my baby?
An NT measurement of 3.5mm or more is considered higher than average and may indicate a greater chance of chromosomal or genetic conditions or physical anomalies, such as heart defects . If your scan indicates an increased NT, further testing options will be discussed, including:
- Non-Invasive Prenatal Testing (NIPT): A blood test analysing fetal DNA in the mother’s bloodstream.
- Chorionic Villus Sampling (CVS): A diagnostic test involving a sample from the placenta.
- Amniocentesis: A diagnostic test analysing amniotic fluid.
- Early fetal cardiac scan
- Early fetal anatomy scan
These tests can provide more definitive information about your baby’s health.
What if my nuchal translucency scan result shows an increased chance of the presence of a chromosomal condition?
The nuchal scan is a screening test, not a diagnostic one, meaning it assesses risk but doesn’t confirm a diagnosis. If your chance for chromosomal conditions is increased, further testing options will be discussed, including:
- Non-Invasive Prenatal Testing (NIPT): A blood test analysing fetal DNA in the mother’s bloodstream.
- Chorionic Villus Sampling (CVS): A diagnostic test involving a sample from the placenta.
- Amniocentesis: A diagnostic test analysing amniotic fluid.
What is the next scan that I should have after the nuchal scan?
If your NT scan results indicate a low risk, the next recommended scan is the anomaly scan, typically performed between 20-22 weeks of pregnancy. This detailed ultrasound examines your baby’s anatomy to identify any structural aberrations or abnormalities.
What is the price for the nuchal scan?
Please refer to our Fees & Services page for current pricing, or contact our team directly for more information.
Important Information About Your Nuchal Scan Appointment:
- Duration: Approximately 1 hour for singleton pregnancies.
- Preparation: Arrive 30 minutes early for a blood test measuring free ß-hCG and PAPP-A.
- The nuchal scan will then be performed by a trained doctor holding a valid FMF certificate of competence and license for performing nuchal assessment.
- Results: A printed report will be provided immediately, and a copy will be emailed to your referring doctor if details are provided.
- Images: 2D (black and white) and 3D (coloured) images are included at no extra charge.
- Second Opinions: If seeking a second opinion, please bring previous reports to your appointment.
- Cervical Assessment: If required, a transvaginal cervical assessment may be performed at an additional cost.
