Low testosterone increases LH and FSH secretion, while high testosterone inhibits LH and FSH production via a feedback loop.

“the hypothalamus in response to low testosterone will secrete gonadotropin releasing hormone it secretes that to another part of the endocrine system called the pituitary gland which is divided into two pieces an anterior and a posterior so in the anterior pituitary gland in response to gonadotropin releasing hormone two other hormones are released and these are hormones that most people might even be familiar with because you'll see them on the blood test one is called lh or luteinizing hormone the other is called fsh or follicle stimulating hormone”