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Scientists hunt for immune clues behind unexplained infertility and miscarriage

NCT ID NCT06826365

Knowledge-focused Sponsor: Jagiellonian University 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 immune cells in the womb lining and blood of women with unexplained infertility or repeated miscarriages, compared to fertile women. Researchers want to see if differences in these cells help explain why some women have trouble getting pregnant. The study involves 50 women and uses blood tests and womb tissue samples to analyze immune cell types.

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 50 people

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

Started

Jul 2025

Expected to finish

Jun 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

Women undergoing endometrial aspiration biopsy for the diagnosis of: i) idiopathic infertility, ii) recurrent miscarriages, iii) other conditions requiring histopathological examination of the endometrium (control).

Ages

18 to 45 years

Sex

Female participants only

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: * age 18-45 years * idiopathic infertility * at least 2 miscarriages * other benign gynecological conditions subjected to endometrial sampling Exclusion Criteria: * miscarriage within last 3 months * abdominal/uterine surgery within last 3 months * viral/bacterial infection within last 3 months * antibiotic therapy within last 3 months

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Conditions

The condition(s) this trial relates to.

female infertility female reproductive system disorder habitual spontaneous abortion

As listed by the trial registrant

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

Gynecologic disease Infertility, female Recurrent miscarriage

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

  • Jagiellonian Univeristy

    RECRUITING

    Krakow, Poland

More trials for these conditions

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