What role does Stuhlprobe play in fertility?

Stool testing (microbiome analysis) is increasingly discussed in the context of fertility. The gut microbiome can influence reproductive health through inflammation, hormone metabolism (e.g., estrogen reabsorption via the 'estrobolome'), and immune modulation. Studies have linked altered gut flora to conditions like endometriosis, PCOS, and recurrent miscarriage. However, the evidence is mostly mechanistic or based on small human studies; large randomized trials are lacking. Consumer stool tests, such as those offered by MyBody-X, provide general microbiome profiles but are not validated for fertility-specific diagnostics. They may offer insights into gut diversity or potential dysbiosis, but direct causal links to fertility remain uncertain. Such tests should not replace a standard fertility workup by a specialist. Marketing claims often overstate the role of the microbiome. In summary, while the gut–fertility axis is a promising area of research, current evidence is moderate at best, and stool tests are not a clinically established tool for fertility assessment.