Could severe bleeding after childbirth signal an undiagnosed disorder?
NCT ID NCT06970860
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This study aims to find out if some women who had severe bleeding after a vaginal delivery have an undiagnosed bleeding disorder. Researchers will test blood samples from 150 women who lost at least 1000 mL of blood during or after birth in the past year. The goal is to better understand why some women bleed heavily and to improve future care.
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Study facts
What this study's own registry entry says, in plain language.
- Participants
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About 150 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Nov 2025
An estimate. Start dates often move.
- Expected to finish
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Sep 2029
An estimate. End dates often move.
- Lead sponsor
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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
The women included in the study will be adult women who experienced severe postpartum hemorrhage, defined as blood loss ≥1000 mL after a vaginal delivery. These women will be identified by the teams from the maternity units in Finistère.
- Ages
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18 years and older
- Sex
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Female participants only
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide 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 ≥ 18 years old * Who experienced severe postpartum hemorrhage, defined as blood loss ≥ 1000 mL, following a vaginal delivery in the previous 12 months, in a maternity unit in Finistère Exclusion Criteria: * Women who are pregnant at the time of inclusion * Women with a known hereditary bleeding disorder (Willebrand's disease, hemophilia carrier, etc.) or acute or chronic Immune thrombocytopenia (ITP) prior to delivery. * Women with a known other bleeding pathology prior to delivery * Women taking a treatment that interferes with hemostasis, such as aspirin, anticoagulants or non-steroidal anti-inflammatory drugs (biological sampling may be postponed until after the interfering treatment has stopped, in the case of occasional use of the latter). * Women on long-term anticoagulant or antiaggregant therapy * Women under legal protection, * Women not affiliated to the French social security system.
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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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
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CHU de Brest
Brest, 29200, France