Can the baby do three thyroid function tests after 12 days of birth?

Patient's question:

Hypothyroidism during pregnancy, blood test for thyroid function was done 12 days after the baby was born (normal), now the baby is three months old, I want to re-examine, is it necessary?

Doctor's answer:

Thyroid function tests are mainly used to rule out congenital hypothyroidism, which is a genetic metabolic disease. The earlier it is detected and treated, the less impact it will have on the child.
Vaccines are injections of attenuated live virus vaccines, which have no effect on thyroid function. There is no need to worry. You may experience low-grade fever, which is a normal reaction to vaccination. There is no need to be concerned, and symptomatic treatment is sufficient.

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