What to watch with CLOCK and Fruchtbarkeit?

The CLOCK gene regulates circadian rhythm, and variants have been linked to fertility outcomes – e.g., menstrual cycle irregularities, reduced oocyte quality, and lower sperm motility. However, the evidence is moderate: mostly observational and GWAS studies, not yet clinically actionable for individual prediction. Consumer DNA tests (like MyBody-X) can report your CLOCK genotype, but they cannot diagnose or predict fertility. Lifestyle factors – consistent sleep schedule, avoiding shift work, reducing blue light at night – have stronger, proven effects. From a regulatory perspective (EU AI Act, MDR), such tests must not make medical fertility claims unless certified as medical devices. Be cautious of marketing that overstates genetic influence. For real fertility concerns, consult a reproductive specialist; genetic testing is only a small piece of the puzzle.