Myths vs facts: Stuhlprobe and Fruchtbarkeit

The claim that a stool test can predict or treat fertility is a myth often promoted by commercial providers. In reality, there is emerging evidence that the gut microbiome influences fertility through hormone metabolism, inflammation, and nutrient absorption – for example in PCOS or endometriosis. However, the research is still limited: most data come from animal or small human studies, and standardized clinical cut-offs are lacking. A stool sample alone cannot diagnose a fertility disorder or predict pregnancy. It can serve as a complementary tool within a comprehensive medical workup, but it does not replace hormone tests, ultrasound, or semen analysis. Moreover, the microbiome fluctuates with diet, medications, and lifestyle, complicating interpretation. Bottom line: stool tests are a promising research area but not yet an established clinical test for fertility. Consumers should be skeptical of exaggerated claims and rely on evidence-based approaches.