What role does CYP1A2 play in Fruchtbarkeit?

CYP1A2 is a cytochrome P450 enzyme involved in metabolizing estrogens and other endogenous compounds. Genetic variants, such as the *1F allele (rs762551), can alter enzyme activity and thereby influence estrogen levels, which may affect fertility. Some studies have linked CYP1A2 polymorphisms to conditions like endometriosis or to outcomes in assisted reproduction, but effect sizes are small and findings inconsistent. Lifestyle factors like smoking and caffeine intake strongly induce CYP1A2 activity, further complicating the picture. Overall, the evidence for a direct role of CYP1A2 in fertility is moderate, based mainly on mechanistic and observational data. Consumer genetic tests may overstate the impact. A comprehensive fertility assessment should include hormonal profiling, clinical evaluation, and lifestyle factors rather than relying solely on this single gene variant.