Can FUT2 help with fertility?

The provided context does not contain direct evidence linking FUT2 to fertility. FUT2 determines secretor status and influences gut microbiome composition and vitamin B12 absorption. Some research suggests indirect effects on immune function and nutrient status, but no robust clinical data connect FUT2 variants to fertility outcomes. Therefore, any claim that FUT2 can help with fertility is not supported by the given knowledge base. The evidence level is unclear/mechanistic at best. Consumers should rely on validated fertility markers (e.g., hormone panels, semen analysis) rather than single gene tests. Further research is needed before clinical application.