High TSH and low Testosterone , Low FSH , LH

Dear Doctor ,

My son is 11 years old , 152.2 Cms Tall , 61 Kgs , recently he had been diagonised with Subclinical Hypothyroid with TSH level of 7.34 , Also he has low Testosterone counts with 33.44 ng/dl and low FSH with 0.3 mlu/ml and low LH of 0.07 mlu/ml while his Prolactin is normal at 7.34 ng/ml .

I consulted a Endocrinologist and he adviced to be on diet for 2 months and prescribed Thyronorm tablets 1 per day before break fast , While he didnt advice for Testosterone enhancing medication .

Pl advice me if I am following the right medication and is it required for him to take Testosterone injection at this stage .

In an ticipation of your reply