Read about screening for thalassaemia in pregnancy, testing for the condition later in life and getting a test to see if you're a carrier of thalassaemia.
Thalassaemia is often detected during pregnancy or soon after birth.
Blood tests can also be carried out at any time to check for the condition or to see if you're a carrier of thalassaemia and are at risk of having a child with the condition.
Screening during pregnancy
Screening to check if a baby is at risk of being born with thalassaemia is offered to all pregnant women in England.
This involves having a blood test to check if you have the thalassaemia trait. If the mother does have the trait, the father is then offered a test to see if they carry it too.
Screening should ideally be carried out before you're 10 weeks pregnant, so you and your partner have time to consider the option of further tests to find out if your baby will be born with thalassaemia.
Read more about screening for thalassaemia during pregnancy.
Testing after birth or later in life
Newborn babies aren't routinely tested for thalassaemia because the test used isn't always reliable soon after birth and the condition isn't immediately dangerous.
However, the main form of the condition – beta thalassaemia major – is often picked up as part of the newborn blood spot test (heel prick).
A blood test can be carried out at any point to diagnose the condition if a child or adult has symptoms of thalassaemia and the condition wasn't picked up earlier on.
Testing for the thalassaemia trait
A blood test can be done at any time to find out if you have the thalassaemia trait and are at risk of having a child with the condition.
This can be particularly useful if you have a family history of the condition or your partner is known to carry thalassaemia.
If you're worried that you could be a carrier of thalassaemia, you can ask for a test from your GP surgery or nearest sickle cell and thalassaemia centre.
Both men and women can have the test.
Read more information about carriers of thalassaemia.