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Womb microbes under the microscope: could they hold the key to unexplained infertility?

NCT ID NCT05337072

Knowledge-focused Sponsor: Universitair Ziekenhuis Brussel Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
This trial is taking on new participants right now.
Not yet recruiting
Registered, but not yet taking participants.
By invitation only
Not open to general applications. Only people the study team invites can take part.
Paused
Paused for now. It may or may not start again.
Ongoing
Running, but no longer taking on new participants.
Completed
The trial has finished. Results may not be published yet.
Stopped early
Stopped early, before it reached the end. That can be for many reasons, including safety.
Cancelled
Cancelled before anyone took part.

Expanded access (not trials)

Expanded access
Not a trial. This treatment can be requested outside a study, case by case, for people who qualify.
Expanded access (paused)
Not a trial. The treatment can normally be requested outside a study, but is unavailable right now.
Expanded access (ended)
Not a trial. The treatment could once be requested outside a study, but no longer can.
Approved
The treatment has been approved, so it is available normally rather than through this programme.

When the status isn't known

Details not published
The full record has not been published yet, so there is little to show here.
Status unknown
This status has not been confirmed recently, so it may be out of date.

First seen Jun 27, 2026 · Last updated Jun 27, 2026

Summary

This study looks at 1,000 women undergoing IVF to understand how tiny organisms in the womb (the microbiome) may cause chronic endometritis, a condition that can harm fertility. Researchers will collect samples from the vagina and womb to compare the microbes in women with and without this condition. The goal is to find better ways to diagnose and treat chronic endometritis, moving away from the current practice of using broad-spectrum antibiotics.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Study facts

What this study's own registry entry says, in plain language.

Participants

About 1,000 people

The number the study aims to enrol. It can still change while the study runs.

Started

Jul 2023

Expected to finish

Dec 2026

An estimate. End dates often move.

Lead sponsor

Other sponsor

The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.

Who can take part

This study's own entry requirements. Only the study team can say for certain whether you qualify.

Who is studied

We will include women planned for IVF/ICSI treatment at Brussels IVF (UZ Brussel) who undergo a diagnostic hysteroscopy in preparation of their treatment.

Ages

Children (under 18), adults (18 to 64) and older adults (65 and over)

Sex

Female participants only

Healthy volunteers

Accepted

You do not need to have the condition being studied to take part.

Show the full entry requirements

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

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.

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Conditions

The condition(s) this trial relates to.

Bronchiolitis Obliterans Syndrome chronic endometritis endometritis infertility disorder

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

Endometritis; chronic Subfertility

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    1 site. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Universitair Ziekenhuis Brussel

    RECRUITING

    Brussels, 1090, Belgium

More trials for these conditions

Other studies related to the condition(s) this trial covers.