After the birth of a baby, parents have their child tested for thyroid. The main purpose is to confirm that the child’s body is developing at the same rate as its peers. The TSH test for newborns is accurate, as each hospital uses its own method of testing, so the resulting standard is naturally different and cannot be generalized. Generally speaking, the normal value is between 0.27 and 4.2. If there is an abnormality, the baby’s value is too high or too low, it needs to be taken seriously. It is recommended to review the test after one month to see if there is any change. If your baby’s TSH is still high, you need to go to the hospital for FT4 and FT3 testing to check for abnormalities in thyroid hormone production. The baby’s TSH is usually very much related to the health condition in the mother’s body, so during pregnancy, you should take more supplements. Iodized salt is a key factor, which has a direct impact on the thyroid aspect of the newborn’s function. Secondly, you should eat more protein-rich foods, such as eggs and meat are good choices for your body. In conclusion, if you ensure the supply of all aspects of your body needed during pregnancy, your child will be born healthy.