What role does CLOCK play in Fruchtbarkeit?

CLOCK is a core circadian rhythm gene that regulates the body's internal clock. It influences reproductive hormones, menstrual cycles, ovulation, and sperm quality. Disrupted circadian rhythms (e.g., from shift work) are associated with fertility issues in both men and women. However, evidence linking specific CLOCK variants to fertility outcomes in direct-to-consumer DNA tests is weak. Most studies show small, inconsistent effects, and lifestyle/environmental factors dominate. The provided context does not include any direct data on CLOCK and fertility. Therefore, claims that a CLOCK variant predicts fertility problems are not scientifically supported. Improving sleep hygiene, managing stress, and maintaining a healthy diet are far more impactful than genotyping this gene.