Clinical trial Recruiting at 1 site Observational Women only

The FLORA project: looking for endometrium microbes linked to chronic endometritis and pregnancy success

Official title: The FLORA-project: in Search for the Microbial Cause of Chronic Endometritis and the Most Appropriate Treatment to Obtain a Successful Pregnancy IVF/ICSI

Run by Universitair Ziekenhuis Brussel · NCT05337072 · Data updated 2026-11-12

This study tests the relationship between the endometrial microbiome and chronic endometritis in women undergoing IVF/ICSI.

Quick facts

Study typeObservational
SexWomen only
Enrollment1000 (estimated)
SponsorUniversitair Ziekenhuis Brussel
Academic / other
Locations1 site (Brussels)
StatusRecruiting
StartedJuly 1, 2023
Main results expectedDecember 31, 2026
Study endsDecember 31, 2026
Registry record updatedMay 15, 2026
Trial IDNCT05337072 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are women planning IVF/ICSI at Brussels IVF (UZ Brussel) who will have a diagnostic hysteroscopy as part of their treatment plan.

Probably not a fit

Patients who do not have endometrial inflammation or whose microbial patterns do not relate to implantation outcomes may not benefit.

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

What this trial studies

This observational study explores whether the endometrial microbiome is associated with chronic endometritis and fertility outcomes in women planning IVF/ICSI. Researchers will analyze diagnostic hysteroscopy samples to characterize microbial composition and inflammation markers using the center’s scoring system for plasma cells. The goal is to see if specific microbial patterns correlate with endometritis and implantation success. Participation is limited to women scheduled for IVF/ICSI at Universitair Ziekenhuis Brussel who have a diagnostic hysteroscopy as part of their treatment workup.

Why it matters

Potential benefit: If successful, the findings could guide more targeted, microbiome-informed approaches to improving implantation and pregnancy rates.

How similar studies have gone: Previous research suggests the endometrial microbiome may be linked to implantation, but clear, widely applicable results are still developing.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Women planned for IVF/ICSI treatment at Brussels IVF (UZ Brussel)
* Women who undergo a diagnostic hysteroscopy in preparation of their treatment

Exclusion criteria:

* If an interventional instead of a diagnostic hysteroscopy in planned
* In the occurence If a previous history of chronic endometritis and the use of antibiotics in the last 3 months.

Where it's running

  • Universitair Ziekenhuis Brussel
    Brussels, Belgium
    Recruiting

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.