What role does Testosteron play in Fruchtbarkeit?

Testosterone plays a central role in male fertility. It is essential for spermatogenesis (sperm production) in the testes, maintaining libido, and supporting the function of accessory sex glands. Testosterone deficiency (hypogonadism) often leads to reduced sperm quality and infertility. However, excessively high testosterone levels, especially from exogenous sources like anabolic steroids, can suppress endogenous hormone production and impair fertility. The evidence is strong (human-strong), based on decades of clinical research. Direct-to-consumer tests (e.g., MyBody-X) can measure testosterone, but interpretation is complex: single values are often not meaningful due to diurnal variation and binding proteins. For fertility assessment, more specific parameters (LH, FSH, semen analysis) are required. Without medical guidance, one should not take supplements or hormones.