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Timing is everything: pre-pregnancy diet and exercise may slash diabetes risk

NCT ID NCT04585581

Prevention Sponsor: Norwegian University of Science and Technology Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now
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 This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 looks at whether combining high-intensity exercise with time-restricted eating before and during pregnancy can lower the risk of high blood sugar (gestational diabetes). Researchers will track 167 women who are planning to become pregnant and have certain risk factors, like being overweight or having had gestational diabetes before. The goal is to see if these lifestyle changes help keep blood sugar levels healthy during pregnancy.

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

167 people

The number who actually took part.

Started

Nov 2020

Expected to finish

Dec 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 39 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: * contemplating pregnancy within the next six months * At least one of the following criteria: BMI ≥ 25 \< 40 kg/m2, gestational diabetes in a previous pregnancy, previous infant \> 4.5 kg, fasting plasma glucose \> 5.3 mmol/L, or Non-European ethnicity Exclusion Criteria: * On-going pregnancy * Trying to conceive ≥ 6 cycles at study entry * Known diabetes (type 1 or 2) * Shift work that includes night shifts \> 2 days per week * Previous hyperemesis * Known cardiovascular diseases * High intensity exercise ≥ 2 hours/week the last 3 months * Habitual eating window ≤ 12 hours

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Conditions

The condition(s) this trial relates to.

gestational diabetes prevention target

As listed by the trial registrant

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

Gestational diabetes

Contacts and locations

Locations

  • St Olavs Hospital

    Trondheim, Norway

More trials for these conditions

Other studies related to the condition(s) this trial covers.