Greetings, Growth is affected by a number of reasons (Nutrition , Thyroid Hormones, Growth Hormone, Genetics) here when we define growth it is just the physical appearance of being large/big and it has nothing to do with intellectual development. Thyroid function tests do tell the production of Throid hormones (T3/T4) from your thyroid gland and TSH from your Anterior pituitary gland. Growth Hormone is made in Anterior pituitary as well as , but due to Growth hormone releasing hormone from hypothalamus. So in a net shell, Throid function tests are not refelctive of the growth hormone production in oir body. Thanks.