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Period blood may hold key to endometriosis diagnosis

NCT ID NCT06245512

Diagnosis Sponsor: Institut National de la Santé Et de la Recherche Médicale, France Source: ClinicalTrials.gov ↗

What the study statuses mean

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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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study aims to find markers in menstrual blood that can diagnose endometriosis, a painful condition affecting many women. Researchers will compare menstrual blood from 250 women with and without endometriosis, and also look at changes after surgery. If successful, this could lead to a simple, non-invasive test using a menstrual cup.

What this could mean

Our plain-language read of the trial. This is informational only, not medical advice or a prediction.

What this could lead to
If successful, this could lead to a simple, non-invasive test for endometriosis using menstrual blood, making diagnosis easier and faster.
What could go wrong
This is an early observational study, not a treatment trial. The markers found may not be reliable enough for widespread use, and results may not apply to all women.

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 250 people

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

Started

Jul 2024

Expected to finish

Mar 2027

An estimate. End dates often move.

Lead sponsor

A government agency

The lead sponsor is a government body.

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 18-45 of age with periods

Ages

18 to 45 years

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: For all participants: Women 18-45 of age who * Have their period * Have given their written consent * Have already used a menstrual cup as a method of hygienic protection * Residing or working in Ile de France (Paris Metropolitan area, France) For participants with endometriosis: * diagnosis of endometriosis established by surgery or imaging (ultrasound and/or MRI) * presence of one or more painful symptoms \> 3 on a visual scale (dysmenorrhea and/or dyspareunia and/or chronic pelvic pain) and/or infertility * for the surgery subgroup: planned surgery in the next 3 months For participants without endometriosis: * painful symptoms \< or equal to 3 on a visual scale (for dysmenorrhea and dyspareunia and chronic pelvic pain), * absence of intense period pain in adolescence (leading to taking pills to control this pain and/or peri-menstrual school absenteeism) Exclusion Criteria: For all participants: * Autoimmune diseases * Chronic diseases other than endometriosis (diabetes, hypertension) * A person who is the subject of a judicial safeguard measure (by declaration) * Infectious diseases (HIV, HBV, if known) * History of menstrual toxic shock syndrome For patients with endometriosis: * endometriosis surgery within the last 3 months.

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Conditions

The condition(s) this trial relates to.

disease endometriosis

As listed by the trial registrant

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

Endometriosis

How to take part

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  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

  • Hopital Cochin

    RECRUITING

    Paris, France

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