INDICATIONS: This is a screening test for Trisomy 21 (Down’s Syndrome), 18 and 13 and sex chromosome aneuploidy assessment. This test is similar but more accurate than the Nuchal Translucency test, so you may choose to have only one or the other performed or you may choose to have both.


LIMITATIONS: Must be performed from 10 weeks gestation


PREPARATION: A full bladder is needed. We find that a simple way to achieve this is to empty your bladder two hours prior to the examination, then over the next hour drink approximately 1 litre of water and do not empty your bladder before your appointment.


PROCEDURE: The main component is a blood test which will be sent to an external laboratory for processing. In addition you will have an ultrasound scan to confirm that everything looks fine with your developing baby. You will lie on a scanning bed during your procedure, which will take approximately 20 minutes. Ultrasound jelly will be placed on your skin to allow transmission of ultrasound waves from a hand held probe which is moved over your lower abdomen. The procedure does not cause any discomfort or pain.


POST PROCEDURE: There are no post procedure precautions.


RESULTS: The results will be obtained from the laboratory and sent to your doctor. In the unlikely event that the results are positive, we will arrange for you to see a genetic councillor. 

 Your procedure report will be sent electronically to your referring doctor. A hyperlink will be added to the report that will allow your doctor to access your images.

We provide long term electronic storage of your report and images, so you may obtain a copy either on the day of the scan or in the future.