Myths vs facts: Cortisol and fertility

Cortisol is often labeled the 'stress hormone' and linked to fertility issues. Fact: Chronically elevated cortisol can disrupt menstrual cycles, inhibit ovulation, and impair sperm quality – supported by observational studies. However, myths exaggerate: a single high reading or everyday stress does not automatically cause infertility. The evidence is mostly 'practice' (clinical experience) and 'human-observational', not strong RCTs. Cortisol fluctuates diurnally and is influenced by sleep, diet, and exercise. Direct-to-consumer tests (e.g., saliva) can offer clues but are insufficient for diagnosis. Those trying to conceive with chronic stress should prioritize medical hormone and fertility workup. One-size-fits-all 'cortisol-lowering' supplements are often marketing hype. Bottom line: Cortisol matters, but it's not the sole key to fertility.