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Fish oil for pregnant moms may shield babies from asthma

NCT ID NCT00798226

Prevention Sponsor: Copenhagen Studies on Asthma in Childhood 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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study tests whether giving pregnant women fish oil supplements can prevent asthma, eczema, and allergies in their children. 800 mothers took fish oil or a placebo from week 24 of pregnancy until one week after birth. The children are then followed for several years to see if they develop these conditions.

What this could mean

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

Active substance
fish oil (n-3 fatty acids)
What this could lead to
If it works, this could point toward a simple dietary supplement during pregnancy to lower the child's risk of asthma and allergies.
What could go wrong
This is an early-phase trial, so results are not yet proven. The supplement may not prevent these conditions, and individual results may vary.

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

Phase 1

The first testing in people. Mainly checks safety and dose, usually in a small group.

Participants

About 800 people

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

Started

Nov 2008

Expected to finish

Jul 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.

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 (mother): * Pregnant women * Living in Sealand, Denmark * Fluent in Danish Language * Willing to let the newborn child participate in the study Exclusion Criteria (mother): * Participating in other clinical trial

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Conditions

The condition(s) this trial relates to.

Eczema allergic disease prevention target asthma prevention target atopic eczema prevention target

As listed by the trial registrant

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

Allergy Asthma Eczema

Contacts and locations

Locations

  • Copenhagen University Hospital of Copenhagen

    Gentofte Municipality, Gentofte, 2820, Denmark

  • Næstved Hospital, Pediatric Department

    Næstved, Næstved, 4700, Denmark

More trials for these conditions

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