Evidence check: Cortisol in the context of Fruchtbarkeit

Cortisol, often called the 'stress hormone', can indirectly affect fertility by disrupting menstrual cycles or sperm quality when chronically elevated. However, the provided context contains no specific studies or data linking a single cortisol measurement directly to fertility outcomes. In practice, cortisol is considered part of a broader stress and hormone profile. Salivary cortisol day profiles may indicate dysregulation of the HPA axis, but they are not standalone fertility markers. The evidence for a causal effect on fertility is mostly mechanistic and based on observational studies. Consumer tests measuring cortisol alone have limited predictive value. Comprehensive fertility diagnostics require additional hormones (LH, FSH, progesterone, estradiol) and medical evaluation. Safety note: Persistent fertility concerns should always be discussed with a specialist before acting on self-test results.