INDICATIONS: Trisomy 21 (Down’s Syndrome), 18 and 13 risk assessment.


LIMITATIONS: Must be performed from 11 weeks gestation to 13 weeks 6 days


PREPARATION: A full bladder is needed. 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.


SCAN PROCEDURE: You may change into a patient gown or adjust your clothing to allow access to the surface of your pelvis for scanning. 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.


BLOOD TESTS: As part of the risk assessment, you will also have a blood test at a laboratory of your choice. If your doctor has not provided a pathology referral, we can provide one for you.


RESULTS: The images obtained by the sonographer will be analysed by a computer program in combination with your blood test results, to give a risk assessment. Information obtained from the ultrasound, your history and the blood test results, are analysed by a computer program to give an overall risk assessment. This may take a week or more to complete. 

 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.