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Pregnancy sleep problems may harm blood vessels

NCT ID NCT05908591

Knowledge-focused Sponsor: University of Alberta Source: ClinicalTrials.gov ↗

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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 Results may not be published yet.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)
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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This status has not been confirmed recently, so it may be out of date.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 Jul 17, 2026 · Last updated Jul 17, 2026

Summary

This study looks at how sleep-disordered breathing (like snoring or pauses in breathing) affects blood vessel function and heart health in pregnant people. Participants complete an 8-day testing protocol at two points during their pregnancy. The goal is to understand whether sleep problems during pregnancy are linked to higher risks for conditions like preeclampsia.

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 this study finds links between sleep-disordered breathing and poor heart health in pregnancy, it could point toward ways to screen or intervene early.
What could go wrong
This is an observational study, so it cannot prove cause and effect. Results may not apply to all pregnant people.

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 109 people

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

Started

Jan 2023

Expected to finish

Apr 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.

Who is studied

Pregnant individuals with and without symptoms of sleep disordered breathing.

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: * over 18 years of age * pregnant (20-24 weeks gestation at enrollment) Exclusion Criteria: * worked shift work past 11pm in the previous month * previously diagnosed with a sleep disorder by a physician

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Conditions

The condition(s) this trial relates to.

pregnancy disorder sleep apnea syndrome

As listed by the trial registrant

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

Pregnancy related Sleep disordered breathing

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

  • Program for Pregnancy and Postpartum Health, University of Alberta

    RECRUITING

    Edmonton, Alberta, T6G 2E1, Canada

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