The link between microbiome tests and fertility is often marketed but not yet well-established by robust science. The gut microbiome influences inflammation, metabolism, and hormone regulation – all relevant to fertility. Some observational studies suggest associations between certain bacterial taxa (e.g., Lactobacillus dominance) and conception success, but large randomized controlled trials are lacking. Consumer microbiome tests like MyBody-X can provide a snapshot of gut bacteria composition, but they cannot diagnose fertility issues or prescribe effective personalized treatments. The evidence level is best described as 'marketing' or 'mechanistic' – plausible but unproven in clinical settings. Caveat: Relying solely on such tests may delay proper medical evaluation. For fertility concerns, consult a reproductive specialist and consider microbiome testing only as part of a broader, evidence-based workup.
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