Is Fertility Check useful for Sport?

A fertility check (e.g., DNA analysis for fertility markers) has no proven utility for sports. The provided context contains no studies linking fertility genes to athletic performance, recovery, or injury risk. APOC3 (triglyceride metabolism) or rs6474412 (addiction) are not associated with fertility. Evidence is therefore 'unclear' or 'marketing'. Athletes seeking to optimize nutrition or training should rely on validated biomarkers (e.g., iron status, vitamin D, lactate) rather than fertility DNA tests. Such a check may be useful for family planning, not for sports goals. Beware of exaggerated claims from direct-to-consumer companies.