When is nuchal translucency scan recommended for Down syndrome?

This ultrasound measures the fluid space at the back of the baby’s neck and also checks aspects of early development. The measurement is combined with pregnancy details and, where offered, blood screening to estimate a chance of chromosome conditions. It is a screening assessment, not a diagnosis. A higher-chance result can lead to a discussion about further ultrasound review, genetic counselling, or diagnostic testing.

Ask your maternity team when the scan should be performed in your pregnancy and whether it is paired with blood screening. Bring information about your pregnancy dates and relevant medical history. Before attending, consider what you would want to know and what follow-up choices you might want explained. Read about the [Nuchal Translucency Scan](/treatments/pregnancy-and-birth-care/nuchal-translucency-scan/).

Contact your maternity team if the scan cannot be completed, the result is described as higher chance, or you are unsure what the report means. Ask about the next step rather than interpreting the measurement alone. Seek urgent pregnancy care for heavy bleeding, severe abdominal pain, fainting, or fluid leaking, whether or not screening has been done.

Ask what the scan can and cannot detect, whether blood screening is available, how results are communicated, and which diagnostic tests could confirm a chromosome condition. You can also ask about other ultrasound findings and available counselling.