Evidence check: Fertility Check in the context of Sport

A fertility check in the context of sport is not a well-established medical standard. The evidence is weak: some genetic variants (e.g., in LEPR or GPX1) may theoretically influence hormone regulation or sperm quality, but effect sizes are small and study results are inconsistent. More relevant factors include training load, nutritional status (iron, zinc, vitamin D), stress, and sleep. Direct-to-consumer tests often provide probabilistic results without clinical validation. A proper fertility check should be medically supervised and typically includes hormone panels, semen analysis, and imaging – not just DNA markers. In sports, caution is warranted: overtraining can impair fertility, but a genetic test alone does not provide reliable insight.