Your midwife or doctor can give you more information about these tests and discuss what the results may mean for you.
A pregnancy scan or ultrasound scan uses high-frequency sound waves to create a moving image of your baby and you can see the image on a screen.
Your midwife will advise you which tests are offered and why.
These tests can help you find out more about your own health and the health of your baby before birth.
The information which these tests can provide may help your midwife to provide the best care possible during your pregnancy and the birth.