If your doctor or specialist has just told you that you have an underactive thyroid gland (hypothyroidism) that you need treatment for, you might like to start here.

If you are pregnant, or are planning to become pregnant, there are some special things you need to know

Treatment is recommended for some women by their doctor

An underactive thyroid can be effectively treated by taking a medicine called Eltroxin to replace the thyroxine your thyroid isn’t producing enough of.

If you are prescribed Eltroxin by your doctor, it is important you take it for your health and your baby’s brain development.

If your doctor thinks you have an underactive thyroid

If you are pregnant, or are planning to become pregnant, a test for an underactive thyroid is not normally or automatically requested. If you have concerns about possible thyroid issues, discuss them with your doctor.  

However, if your doctor thinks there might be an issue, they will arrange for a blood test. If the blood test shows you do have an underactive thyroid, your doctor may request more blood tests at different stages throughout your pregnancy.

Many women return to normal levels after delivery.

During your pregnancy, your doctor will monitor you closely and may need to adjust your dose throughout your pregnancy.

In some situations, your doctor might also want you to see a specialist.

Eltroxin is not thought to be harmful to an unborn baby when taken by a pregnant woman. However, thyroxine levels need to be watched carefully during pregnancy because too much or too little thyroxine in the mother’s bloodstream could affect the well-being of an unborn baby.

If you are breastfeeding or planning to breastfeed, thyroxine does pass into breast milk, although it is unlikely to have a harmful effect on a baby. However, it might interfere with the results of tests to detect congenital hypothyroidism in your baby, so you should not breastfeed until your doctor says it is okay to do so.

If you have any concerns or you are experiencing side effects, talk to your doctor. Click here for further information.

Find out more

Find out more about blood tests and treatment with a tablet called Eltroxin.