Nuchal translucency is a term used to describe  a collection of fluid under the skin at the back of your baby’s neck. It can be measured using ultrasound: between 11 weeks and 13 weeks plus six days of pregnancy, or when your baby measures between 45mm (1.8in) and 84mm (3.3in).  The optimal time for this scan is 12 1/2 weeks.

NB – Nasal Bridge. NT – Nuchal Translucency

By taking into account your age, past history, the thickness of this space, and the exact stage of pregnancy, we are able to calculate a revised risk of your baby being affected with Down syndrome. The presence or absence of the bridge of the fetal nose and other scan findings can also be included in the risk assessment. We expect to detect 85% of babies with Down syndrome and 95% of babies with the other major chromosome abnormalities ( Edwards, Patau and Turner syndrome) at this scan. See Pregnancy Complications for further information.


During this scan we can again accurately date the pregnancy and identify a significant number of major structural abnormalities. It is possible in over 70% of cases to determine the sex of the baby (with 70-95% accuracy) and in many cases obtain good 3D/4D images. There is no additional charge for this and as such if 3D/4D images cannot be obtained due to BMI, this is not a reason for Mr Penman to rescan.

(includes DVD & CD) +/- Blood test screening (PAPP-A & bHCG)

To book a scan appointment, please telephone the Spire Alexandra Hospital (01634 662863)  or complete the baby scan booking form.