Evidence check: Stuhlprobe in the context of fertility

Using a stool sample to assess fertility is not yet scientifically well-established. While there is emerging research linking the gut microbiome to fertility through inflammation and hormone metabolism (e.g., estrogen reabsorption), the evidence is largely mechanistic or based on small human studies. MyBody-X offers microbiome tests that report bacterial composition, but these are not validated for diagnosing or treating fertility issues. Clinical utility remains low; fertility evaluation should rely on proven methods like hormone panels, ultrasound, and semen analysis. Be cautious of marketing claims: a stool test alone cannot explain or resolve fertility problems. The evidence level is 'unclear' (mechanistic associations only, no clinical validation).