What does the Nuchal Translucency measurement indicate?

The Nuchal Translucency (NT) measurement, obtained during the Nuchal Translucency scan between the 11th and 14th weeks of pregnancy, indicates the thickness of the clear space at the back of the baby's neck. This measurement is instrumental in assessing the risk of chromosomal abnormalities, particularly Down syndrome, as well as potential cardiac anomalies. An increased NT measurement, in conjunction with maternal age and other factors, may suggest a higher likelihood of such conditions. However, it is crucial to emphasise that the NT measurement is part of a screening process, not a definitive diagnosis. Further diagnostic tests may be recommended for confirmation, and counselling is provided to parents to navigate their options and understand the broader context of prenatal care.

Are there specific factors that might affect the accuracy of the Nuchal Translucency measurement?

Several factors can influence the accuracy of the Nuchal Translucency (NT) measurement during pregnancy, including the gestational age at which the scan is conducted (ideally between the 11th and 14th weeks), the baby's position during the scan, maternal characteristics such as obesity, the complexity of twin pregnancies and individual foetal positions, the presence of foetal abnormalities affecting the neck or head region, the precision of the Crown-Rump Length (CRL) measurement, and the experience of the ultrasound operator. These variables underscore the importance of careful consideration and communication by healthcare providers to manage expectations and guide decision-making regarding the interpretation of NT measurements and potential follow-up diagnostic tests.

What information will I receive after the Nuchal Translucency scan, and when can I expect the results?

After the Nuchal Translucency (NT) scan, you can expect to receive information about the measurements taken during the scan, particularly the thickness of the clear space at the back of the baby's neck. The healthcare provider will typically combine the NT measurement with other factors, such as maternal age and blood test results, to estimate the risk of chromosomal abnormalities like Down syndrome. It's important to note that the NT scan is a screening test, not a diagnostic one. If the results indicate an increased risk, your healthcare provider will discuss the findings with you, provide counselling, and offer options for further diagnostic tests, such as chorionic villus sampling (CVS) or amniocentesis, which can provide more conclusive information about the baby's health. The timing of receiving results can vary, but healthcare providers often aim to communicate findings promptly to allow for informed decision-making and further planning. It's crucial to discuss specific timelines with your healthcare provider during or after the NT scan.

Nuchal Translucency Scan Sydney | 12-14 weeks

Home Pregnancy Ultrasound Nuchal Translucency Scan (12-14 Weeks)

First trimester structural assessment of your baby