How are CYP1A2 and fertility related?

The relationship between CYP1A2 and fertility is not well established. CYP1A2 is involved in estrogen metabolism and clearance; theoretically, genetic variants (e.g., *1F) that alter enzyme activity could affect hormone balance and fertility. Some studies suggest links to endometriosis risk or IVF outcomes, but evidence is limited, often mechanistic or from small association studies. Confounders like smoking, caffeine, and medications strongly influence CYP1A2 activity, making direct genetic predictions unreliable. Currently, no robust clinical guideline supports using CYP1A2 genotyping for fertility assessment. If you have fertility concerns, focus on comprehensive medical evaluation including hormone profiling, lifestyle factors, and standard fertility workup rather than single-gene tests.