Amniocentesis is only offered to pregnant women who have a higher chance of having a baby with a genetic or chromosomal condition. It can diagnose a range of conditions.
If your test results or medical or family history suggest you have a higher chance of having a baby with a genetic or chromosomal condition, you may be offered amniocentesis.
You do not have to take the test. It's up to you to decide whether you want it.
Amniocentesis can be used to diagnose a number of conditions, including:
If you're offered amniocentesis, ask your doctor or midwife what the procedure involves, and about the risks and benefits, before deciding whether to have it.
You may also find it helpful to contact a support group, such as Antenatal Results and Choices (ARC), a charity that offers information, advice and support on all issues related to screening during pregnancy.
The test will usually be able to tell you for certain if your baby will or will not be born with any of the conditions tested for.
You might find that your baby does not have the condition screening tests said they might have, which can be reassuring.
But if the test confirms that your baby does have the condition they were tested for, you can decide how you'd like to proceed.
There's a risk of miscarrying the baby. Up to 1 out of every 100 women who have amniocentesis will miscarry. You may feel this outweighs the potential benefits of the test.
Some women decide they'd rather find out if their baby has a genetic condition when their baby's born.