What is it?

An amniocentesis is a procedure to remove a small amount (roughly a tablespoon) of amniotic fluid from around your baby in your womb.
It takes about 10 minutes and is normally done in the antenatal clinic.
The test can be a little uncomfortable but should not hurt.
Occasionally the procedure cannot be done due to the position of the baby or the doctor might not be able to get any amniotic fluid from around your baby. If this happens, the doctor may suggest that the procedure is done on another day.

By permission of Antenatal Screening Wales