What is one of the primary hormones produced by the testes?

Testosterone is one of the primary hormones produced by the testes and plays a crucial role in male development and reproductive function. It is responsible for the development of male secondary sexual characteristics, such as increased muscle mass, body hair, and a deeper voice during puberty. Additionally, testosterone is essential for the production of sperm and contributes to libido in males.

The testes are specialized organs responsible for not only hormone production but also for spermatogenesis. While other hormones like estrogen and progestins are primarily associated with female reproductive functions, testosterone's significance in male reproductive health makes it the key hormone secreted by the testes. Cortisol, on the other hand, is primarily associated with stress response and metabolic regulation and is produced by the adrenal glands, not the testes. Thus, testosterone stands out as the primary hormone linked to male reproductive health.