Clinical trial Recruiting at 1 site Interventional Ages Any age to 35 Women only

Probiotics for treating endometriosis

Official title: The Role of Probiotics in the Treatment of Endometriosis (ProMetrioS): a Randomised Double-blinded Placebo-controlled Cross-over Trial

Run by The Gut Microbiome Center (Centar za crijevni mikrobiom) · NCT06929364 · Data updated 2026-11-12

This study is testing whether taking specific probiotics can help improve gut health and quality of life for people with endometriosis.

Quick facts

Study typeInterventional
AgesAny age to 35 Years
SexWomen only
Enrollment40 (estimated)
SponsorThe Gut Microbiome Center (Centar za crijevni mikrobiom)
Academic / other
Locations1 site (Zagreb)
StatusRecruiting
StartedNovember 1, 2024
Main results expectedMay 1, 2025
Study endsNovember 30, 2025
Registry record updatedApril 16, 2025
Trial IDNCT06929364 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are women aged 18 to 35 with a confirmed diagnosis of stage III or IV endometriosis.

Probably not a fit

Patients over 35 years old, immunocompromised individuals, or those with chronic inflammatory diseases will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial investigates the effects of specific multistrain probiotics on patients with endometriosis. It is a randomized, double-blinded, placebo-controlled, cross-over trial that aims to determine if probiotic treatment can significantly alter gut microbiome composition and functionality in these patients. Participants will undergo a six-month study period, which includes two intervention phases with a washout period in between to allow the gut microbiome to return to baseline. The study will assess various outcome measures, including gut microbiome changes and quality of life, at four distinct time points.

Why it matters

Potential benefit: If successful, this study could provide a novel treatment option for managing endometriosis symptoms through gut microbiome modulation.

How similar studies have gone: While the approach of using probiotics in endometriosis is relatively novel, previous studies have shown promising results in gut microbiome modulation for other conditions.

Who can join: the full rules

Show full inclusion / exclusion criteria
Minimum Age: - Maximum Age: 35 Years Sex: Female Gender Based: Ye - only women can participate in this study Accepts Healthy Volunteers: No

Inclusion Criteria:

* adult subjects with stage III or IV endometriosis diagnosis confirmed by biopsy

Exclusion Criteria:

* Age \> 35 years
* Immunocompromised patients
* Patients with chronic inflammatory diseases (e.g., autoimmune disorders)
* Pregnancy
* Use of supplements and foods with probiotics
* Use of immunosuppressant, antibiotic, proton pump inhibitors and corticosteroid drugs
* Use of probiotics product less than one month before start of study or during study

Where it's running

  • University Hospital Center Zagreb
    Zagreb, Croatia
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.