Is FUT2 useful for Fruchtbarkeit?

Whether FUT2 is useful for fertility is not clearly supported by current evidence. The FUT2 gene determines secretor status and influences gut microbiome composition and vitamin B12 absorption. Some observational studies suggest a link between secretor status and fertility, possibly through immune modulation or B12 levels. However, robust clinical trials demonstrating a causal effect are lacking. The evidence is therefore mechanistic and preliminary. A genetic test for FUT2 can reveal secretor status, but its clinical utility for fertility remains uncertain. For fertility issues, established medical evaluations (hormone panels, semen analysis, etc.) should take priority. The practical value of a FUT2 test for individual fertility counseling is currently low.