Amniocentesis

16 weeks onwards

This test is usually performed to exclude Down Syndrome although it can be used to analyse other genetic problems, give a pre-birth paternal test or give a 100% accurate gender identification.

The procedure involves passing a fine needle through your tummy into the amniotic fluid within your pregnancy sac. The cells in this fluid come from your baby and therefore analysis of fluid will give the same result as if the fetus itself were examined.

The procedure is done under continuous ultrasound vision in order to keep any threat to your developing baby to an absolute minimum.

A fluid sample is sent it to the laboratory for analysis with results for Down Syndrome available in 2-3 days. Full analysis of other chromosomal problems can take up to 2 weeks.

Discomfort is minimal, no local anesthetic is necessary and the actual procedure only takes one or two minutes.

The risk of miscarriage associated with the test is between 0.5 to 1%.

The laboratory test usually gives a straightforward answer and the chance of receiving an inconclusive result is lower than for a CVS (about 0.1%).

The procedure is only performed by qualified Consultants on certain days so please be prepared to be flexible with your booking date.

Our highly experienced Fetal Medicine Specialists successfully perform hundreds of these procedures each year and you will have a thorough consultation and time to ask questions before the Amniocentesis.

Before the procedure we shall need to know your blood group. If you are Rhesus Negative you will be given an injection of Anti-D at an additional cost.

Because of the preparation required for this test we usually ask for a £100 deposit to secure an appointment.

For bookings information and cost please see our Prices page.