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Fertility drugs and gut health: a new study investigates the link

NCT ID NCT07533968

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

What the study statuses mean

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Recruitment status, easiest to join first

Recruiting now
This trial is taking on new participants right now.
Not yet recruiting This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 whether fertility treatments change irritable bowel syndrome (IBS) symptoms in women. Researchers will follow 120 women—60 with PCOS starting IVF and 60 freezing eggs for social reasons. Participants fill out questionnaires about gut symptoms, anxiety, and depression before and after hormone treatment. The goal is to understand how hormonal stimulation affects IBS, not to treat or cure any condition.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 120 people

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

Expected to start

Apr 2026

An estimate. Start dates often move.

Expected to finish

May 2027

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.

Ages

18 years and older

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: * Diagnosis of PCOS according to the 2004 Rotterdam criteria (only for the PCOS group and not for the social freezing group) * Initiating their first cycle of IVF treatment (PPOS and freeze only protocol) * Nulliparous * ≥ 18 years * Willing to participate in the study * Understanding Dutch, French or English Exclusion Criteria: * \- Known inflammatory bowel disorder * Known major intestinal bowel disorder * Known systemic or auto-immune disorder with implication for the GI system * History of abdominal surgery (appendectomy and cholecystectomy allowed if \>6 months earlier) * History of gastro-enteritis in the past 6 weeks

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Conditions

The condition(s) this trial relates to.

polycystic ovary syndrome

As listed by the trial registrant

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

PCOS (polycystic ovary syndrome)

How to take part

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

  1. The official record

    The full official record for this study. This one lists no contact details, but it is the first place any would appear.

    Open the record ↗

  2. 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.

More trials for these conditions

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