How is genetic testing done?

Genetic testing of adults is usually done on a routine blood sample. Sometimes a saliva or buccal (cheek swab) sample can be used. Genetic testing of a pregnancy is usually done on a sample from the placenta or the amniotic fluid.

Before you go for testing, you’ll be offered genetic counselling. The counsellor will talk with you about the reasons to have or not have the test.

Not everyone at a higher risk of a condition chooses to get tested; it’s a personal decision. A genetic counsellor can give you information and support to help you decide if testing is something you want to do.