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Polycystic ovary syndrome

Compared within 1 study that had both: 50 people with polycystic ovary syndrome and 43 healthy people. 10 microbes are less common in people with polycystic ovary syndrome, and none more common.

A difference is an association: it doesn’t mean these microbes cause, prevent or treat polycystic ovary syndrome.

Phylum

Searching opens both lists and shows only matching rows.

Less common in polycystic ovary syndrome · 10

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Oscillibacter sp. MSJ-31 in 1 study Healthy 65% polycystic ovary syndrome 26%
  2. [Clostridium] leptum in 1 study Healthy 88% polycystic ovary syndrome 54%
  3. Evtepia gabavorous in 1 study Healthy 79% polycystic ovary syndrome 42%
  4. Phocaeicola plebeius in 1 study Healthy 74% polycystic ovary syndrome 40%
  5. Anaerotruncus rubiinfantis in 1 study Healthy 35% polycystic ovary syndrome 8.0%

More common in polycystic ovary syndrome · 0

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people

None compared.

Where these numbers come from

Studies
Only GMrepo projects that had people with the condition and healthy people, 10 or more of each. Numbers come from those studies, never from pooling.Sampled in China.
How common
The share of people whose sample has any of it, in the people with the condition and in the healthy people of those same studies. Tested within studies (Cochran–Mantel–Haenszel, corrected for testing many microbes); a difference counts when it is clear and meaningful (Cohen’s h of 0.2 or more).
Strength word
Counted by code from how many studies point the same way: Seen again and again (3 or more, none clearly the other way), Seen more than once (2, the majority), Seen once (1, listed last). Where studies disagree, a row isn’t listed.
Each study
Tap a row for every study’s own numbers, and for how much carriers have.
Analysis
Our analysis of GMrepo data. GMrepo on Data sources · Read the rules

Also compared · 271 microbes

Compared within studies that had both, but not listed above.

No meaningful difference · 271
PubMed · human studies and reviews first

Recent research

All research on it
  1. Observational Frontiers in endocrinology · 2026
    Gut microbiota variation in admixed Hispanic populations with polyendocrine metabolic ovarian syndrome.
    PubMed ↗
  2. Observational BJOG · 2026
    Microbial and Metabolic Correlates of Endometrial Dysfunction in Polycystic Ovary Syndrome: A Translational Study.
    PubMed ↗
  3. Observational F&S science · 2026
    Integrative machine learning models to unravel gut microbial dysbiosis and functional disruption in polycystic ovary syndrome.
    PubMed ↗
  4. Review Current drug metabolism · 2026
    Exploring Microbiome-based Therapy: Bacterial Flavonoid Synthesis as a Novel Approach to PCOS Treatment.
    PubMed ↗
  5. Meta-analysis Frontiers in cellular and infection microbiology · 2025
    Effect of probiotic-derived metabolites on hormonal and metabolic profiles in women with polycystic ovary syndrome: a systematic review and meta-analysis.
    PubMed ↗

Source: PubMed, U.S. National Library of Medicine · 44 linked papers, last 10 years