normal level of tsh in children
1 An under active thyroid presents with a TSH ranging from 2mIU/L or more than that. 2  A TSH level count ranging between 0.5 and 3mIU/L confirms thyroid disorder. 3  The normal TSH range for newborns ranges from between 1 â 39 mIU/L. 4  The normal TSH levels for children ranges from between 0.7 â 6.4 mIU/L. The range of normal TSH levels for full term newborns is higher, as it can range from between 1.3 and 16 micro units per ML of blood. 2  The TSH range gradually reduces to 0.9 to 7.7 micro units per milliliter after 30 days.