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Can eating only during an 8-Hour window improve pregnancy outcomes for women with severe obesity?

NCT ID NCT06477120

Disease control Sponsor: University of Illinois at Chicago 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This pilot study will test whether time-restricted eating (eating only during an 8-10 hour window each day) is safe and feasible for pregnant women with severe obesity. Sixty women in their second or third trimester will either follow this eating pattern or receive standard care. The goal is to see if this approach can help manage weight and reduce risks like gestational diabetes and high blood pressure.

What this could mean

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

Active substance
Time-restricted eating (behavioral intervention)
What this could lead to
If successful, this could point toward a simple dietary strategy to reduce pregnancy complications in women with severe obesity.
What could go wrong
This is a very small pilot study (60 participants) focused on feasibility and safety, not effectiveness. Results may not apply to all pregnant women, and adherence to the eating window may be challenging.

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.

Phase

Not a phased trial

Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.

Participants

About 60 people

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

Started

Sep 2024

Expected to finish

Nov 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.

Ages

18 to 44 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: * Female based on sex assigned at birth * Preconception body mass index (BMI) 35.0 - 60 kg/m2 * Singleton pregnancy * Age 18-44 years old * 14 - \< = 20 weeks gestational age * Fluency in English to provide consent and complete study procedures * Ability to provide informed consent * Cleared by study doctor and the obstetrician/mid-wife provider to participate * Access to a smartphone to complete intervention procedures Exclusion criteria: * Deemed medically high risk * Multiple pregnancy (e.g., twins) * Type 1 or 2 diabetes mellitus * Early gestational diabetes (diagnosed at \< = to17 weeks gestational age through an oral glucose tolerance test) * Currently eating ≤ 12 hours daily * Autoimmune disorder (e.g., rheumatoid arthritis) * iron deficiency anemia * Inflammatory bowel disease * Previous spontaneous preterm birth * History of bariatric surgery * Night shift work * Currently incarcerated * Eating disorder

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Conditions

The condition(s) this trial relates to.

Gestational Weight Gain Intermittent Fasting morbid obesity

As listed by the trial registrant

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

Obesity, morbid Pregnancy weight gain Time-restricted eating

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

  • University of Illinois at Chicago College of Applied Health Sciences

    RECRUITING

    Chicago, Illinois, 60612, United States

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