How are ADH1B and fertility related?

The provided context does not address ADH1B and fertility. Based on general knowledge, ADH1B encodes alcohol dehydrogenase, which metabolizes ethanol. Variants like ADH1B*2 increase acetaldehyde levels, causing flushing and reduced alcohol intake. Since heavy alcohol consumption is linked to infertility in both sexes, this genetic variant may indirectly protect fertility by discouraging drinking. However, direct evidence linking ADH1B to fertility outcomes (e.g., sperm quality, ovulation) is limited to observational studies. No RCTs or clinical guidelines support using ADH1B genotyping for fertility advice. MyBody-X likely does not include this gene in fertility panels. Evidence is human-observational/mixed. Caveat: a 'protective' ADH1B allele does not guarantee fertility; many other factors dominate.