Testosterone is crucial for spermatogenesis (sperm production), influencing processes such as meiosis (cell division) and the release of mature sperm. Interestingly, testosterone levels are between 25 and 125 times higher in the testes than in the blood. This means that even if blood testosterone levels are low, there is generally still sufficient testosterone in the testes for sperm production. Although testosterone is a vital hormone for male fertility, increasing your testosterone levels does not necessarily lead to enhanced fertility. In fact, the opposite may occur. Administering external (exogenous) testosterone can disrupt hormonal balance and actually stop sperm production—a critical point [...]