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New study tracks blood thinner use in pregnant women to prevent bleeding

NCT ID NCT05756244

Knowledge-focused Sponsor: University of Calgary 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 follows 825 pregnant women who need blood thinners for blood clots, observing how these medications are managed around labor and delivery. Researchers aim to see how different strategies affect bleeding risks. The goal is to find safer ways to handle blood thinners during this critical time.

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 better guidelines for managing blood thinners during pregnancy and childbirth, reducing bleeding risks.
What could go wrong
This is an observational study, not a treatment trial, so it won't directly test a new drug or cure. Results may vary across different hospitals and countries.

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 825 people

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

Started

Apr 2023

Expected to finish

Dec 2029

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

Pregnant individuals on anticoagulation for VTE-related indications

Ages

18 to 60 years

Sex

Female participants only

Healthy volunteers

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

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

Inclusion Criteria: * 18 years of age or older * Requires anticoagulation during the antepartum period of pregnancy for a VTE indication, including at least one of: 1. Objectively confirmed VTE (DVT, superficial vein thrombosis \[SVT\], PE or unusual site thrombosis) diagnosed during the current pregnancy; 2. Objectively confirmed VTE diagnosed in a prior pregnancy; 3. Objectively confirmed VTE diagnosed when not pregnant; 4. Inherited or acquired thrombophilia requiring anticoagulation. * Receiving any dose or type of LMWH during the antepartum period Exclusion Criteria: * Anticoagulation for a non-VTE indication, including prosthetic heart valves, atrial fibrillation, prevention of placenta-mediated pregnancy complications, or prevention of recurrent pregnancy loss (participants can be included with a diagnosis of antiphospholipid syndrome (APS) with or without thrombotic events) * Unable to provide or declined consent. * Home or birthing centre planned delivery.

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Conditions

The condition(s) this trial relates to.

pregnancy disorder venous thromboembolism

As listed by the trial registrant

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

Pregnancy related Venous thromboembolism

How to take part

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

  1. The places running it

    14 sites in 5 countries. 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

  • Aarhus University Hospital

    RECRUITING

    Aarhus, 8200, Denmark

  • BC Women's Hospital and Health Centre

    RECRUITING

    Vancouver, British Columbia, V6H 3N1, Canada

  • CHU Sainte-Justine

    RECRUITING

    Montreal, Quebec, H3T 1C5, Canada

  • Duke University Hospital

    RECRUITING

    Durham, North Carolina, 27710, United States

  • Foothills Medical Centre

    RECRUITING

    Calgary, Alberta, T2N 2T9, Canada

  • Hopitaux universitaires de Geneve

    RECRUITING

    Geneva, 1205, Switzerland

  • Le Centre Hospitalier Universitaire of Saint-Etienne

    RECRUITING

    Saint-Etienne, France

  • McMaster University Medical Centre

    RECRUITING

    Hamilton, Ontario, L8N 3Z5, Canada

  • Montfort Hospital

    RECRUITING

    Ottawa, Ontario, K1K 0T2, Canada

  • Mount Sinai Hospital

    RECRUITING

    Toronto, Ontario, M5G 1X5, Canada

  • Royal Alexandra Hospital

    RECRUITING

    Edmonton, Alberta, T5H 3V9, Canada

  • St. Boniface Hospital

    RECRUITING

    Winnipeg, Manitoba, R2H 2A6, Canada

  • The Ottawa Hospital - General Campus

    RECRUITING

    Ottawa, Ontario, K1H 8L6, Canada

  • The Sir Mortimer B. Davis Jewish General Hospital

    RECRUITING

    Montreal, Quebec, H3T 1E2, Canada

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