Nuchal Translucency assessment is a test offered to pregnant women to screen for chromosomal problems and heart defects. The test suggests which pregnancies are at higher risk of abnormality and may need further investigation. It is painless and carries no risk to the pregnancy.

Nuchal translucency thickness is the thickness of the black space (fluid) in the neck area of the foetus. Findings have shown that most have some fluid, but if there is more than the normal amount the risk of chromosomal abnormality is increased. We use a computer programme which combines the foetal nuchal translucency thickness and your age to calculate an estimate of your risk. A low risk is expressed as 1in more than 300. A high risk expressed as 1 in less than 300.

A normal result does not guarantee a normal baby but does imply that an abnormality is unlikely. An abnormal result does not mean that the baby is abnormal but suggests further tests may be necessary. Your doctor will be able to give you advice about further testing, such as Chorionic Villus sampling (CVS) or Amniocentesis. Cordocentesis is an alternative test which is available at 20 to 24 weeks gestation.

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