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EndocrinologyReal-World Cohort3 min read

Heterogeneity of microbiome responses to menopausal hormone therapy among perimenopausal women

MHT efficacy (real-world effectiveness in the trial) also varied according to baseline gut community type: Phocaeicola vulgatus-dominated women exhibited greater hormonal responsiveness, superior clinical outcomes and were more likely to achieve 4-week rapid clinical remission than Prevotella copri-dominated women.

Published in Nature MedicineObservational cohort study
3/5 Observational
Evidence Meter · 3/5

Real-World Observation

Finds meaningful patterns in human health records or cohorts, though observational data cannot prove direct cause.

Source

Real-World Observation

3/5

These findings support a precision MHT framework integrating gut and vaginocervical community typing for personalized care.

What Changes?

Endocrinology · Real-World Cohort

Current Standard

Conventional endocrinology practice relies on standard-of-care monitoring and existing regimens prior to this study.

New Finding

Baseline vaginocervical community types determined differential outcomes: G. vaginalis-dominated individuals shifted most toward healthier communities, whereas diversified individuals improved least.

3 Key Takeaways

Plain English Summary
  1. 01Core Finding

    Here we show that oral estradiol/dydrogesterone, given for 6 months to 356 perimenopausal women, improved neuroendocrine, metabolic and symptom outcomes and induced site-specific microbial remodeling.

  2. 02Study Evidence

    Tested in a study at the real-world stage.

  3. 03Practical Meaning

    findings reveal real-world links, though lifestyle or unmeasured factors cannot be fully ruled out without an RCT.

What This Means for You

Baseline vaginocervical community types determined differential outcomes: G. vaginalis-dominated individuals shifted most toward healthier communities, whereas diversified individuals improved least. MHT (real-world effectiveness in the trial) also varied according to baseline gut community type: Phocaeicola vulgatus-dominated women exhibited greater hormonal responsiveness, superior clinical outcomes and were more likely to achieve 4-week rapid clinical than Prevotella copri-dominated women. These findings support a precision MHT framework integrating gut and vaginocervical community typing for personalized care.

The Discovery

Menopausal hormone therapy (MHT) alleviates climacteric symptoms, yet its -wide effects and (real-world effectiveness in the trial) determinants remain unclear. Here we show that oral estradiol/dydrogesterone, given for 6 months to 356 perimenopausal women, improved neuroendocrine, metabolic and symptom outcomes and induced site-specific microbial remodeling. Vaginocervical and urinary niches showed the most pronounced restructuring, with moderate oral and minimal gut changes. MHT increased vaginocervical Lactobacillus crispatus and reduced Gardnerella vaginalis. Higher baseline vaginocervical L. crispatus predicted greater postintervention vaginocervical and urinary colonization and superior Female Sexual Function Index improvement.

How It Works, Simply

This endocrinology research focuses on gut bacteria. Researchers evaluated it using an observational cohort study at the real-world cohort stage of medical research.

3 Key Takeaways

Clinical Takeaways
  1. 01Core Finding

    Here we show that oral estradiol/dydrogesterone, given for 6 months to 356 perimenopausal women, improved neuroendocrine, metabolic and symptom outcomes and induced site-specific microbial remodeling.

  2. 02Study Evidence

    Tested in a study at the real-world stage.

  3. 03Practical Meaning

    findings reveal real-world links, though lifestyle or unmeasured factors cannot be fully ruled out without an RCT.

01

Biological Mechanism & Study Design

Study Design & Cohort

Observational cohort study

Observational cohort study · Real-World Cohort

Biological Pathway & Modality

Gut bacteria

Intervention: Heterogeneity of responses to menopausal hormone therapy

02

Experimental Findings & Endpoints

Menopausal hormone therapy (MHT) alleviates climacteric symptoms, yet its -wide effects and determinants remain unclear.

Here we show that oral estradiol/dydrogesterone, given for 6 months to 356 perimenopausal women, improved neuroendocrine, metabolic and symptom outcomes and induced site-specific microbial remodeling. Vaginocervical and urinary niches showed the most pronounced restructuring, with moderate oral and minimal gut changes.

MHT increased vaginocervical Lactobacillus crispatus and reduced Gardnerella vaginalis. Higher baseline vaginocervical L. crispatus predicted greater postintervention vaginocervical and urinary colonization and superior Female Sexual Function Index improvement.

03

Clinical Translation & Practice Context

Baseline vaginocervical community types determined differential outcomes: G. vaginalis-dominated individuals shifted most toward healthier communities, whereas diversified individuals improved least.

MHT also varied according to baseline gut community type: Phocaeicola vulgatus-dominated women exhibited greater hormonal responsiveness, superior clinical outcomes and were more likely to achieve 4-week rapid clinical than Prevotella copri-dominated women. These findings support a precision MHT framework integrating gut and vaginocervical community typing for personalized care.

03

The Bottom Line · Clinical Pearl

“These findings support a precision MHT framework integrating gut and vaginocervical community typing for personalized care.”

Published in Nature Medicine · Current Stage: Real-World Cohort

Practical Next Step

Questions for Your Next Doctor Visit

  1. 1Based on my health history, do these endocrinology findings (observational cohort study in endocrinology care) apply to my situation?
  2. 2How do the potential benefits of this approach compare with the standard care I'm currently using?
  3. 3Given the study's key limitation (observational cohort findings reveal real-world links, though lifestyle or unmeasured factors cannot be fully ruled out without an RCT.), what risks or follow-up steps should we watch for?
Endocrinology · Real-World Cohort
Study Type
Observational cohort study

Observational cohort study

Evidence Score
3/5 · Real-World Observation
Evidence Meter · 3/5

Real-World Observation

Finds meaningful patterns in human health records or cohorts, though observational data cannot prove direct cause.

Finds meaningful patterns in human health records or cohorts, though observational data cannot prove direct cause.

Who It Applies To
Observational cohort study in endocrinology care
Intervention & Mechanism
Heterogeneity of microbiome responses to menopausal hormone therapy

Gut bacteria

Key Limitation
Observational cohort findings reveal real-world links, though lifestyle or unmeasured factors cannot be fully ruled out without an RCT.

Translational Stage

LEVEL 2 · Real-World Cohort

Classified as Observational cohort study along the clinical evidence continuum

  1. Lab & Discovery
  2. Early Trials
  3. Human Evidence
  4. 4Real-World CohortActive

Indexed Clinical Entities

Gut Microbiome & Mucosal Metabolites

Original Publication & AMA Citation

Heterogeneity of microbiome responses to menopausal hormone therapy among perimenopausal women. Nature Medicine. Published 2026;Nov 3. Accessed November 15, 2026. https://pubmed.ncbi.nlm.nih.gov/42977757/

Nature Medicine

https://pubmed.ncbi.nlm.nih.gov/42977757/

Read Original Paper

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