The Nuchal scan (or the nuchal translucency scan) is a
special ultrasound scan used to measure the nuchal fold at
the back of the baby's neck. It is thought that babies with
a particularly thick nuchal pad at the back of the neck are
at a higher risk of suffering from heart defects, Down's syndrome or some other
chromosomal problem. Once the risk factor is calculated
using this scan, you will be offered a subsequent
amniocentesis or other invasive test to confirm, or rule
out, these suspicions.
The nuchal scan is not available in all hospitals.