Clinical trial Recruiting at 1 site Phase 3 Interventional Ages 18 to 45 Women only

Fish oil supplementation during pregnancy to prevent asthma in children

Official title: Fish Oil in pREgnancY for Personalized Prevention of Early Childhood Asthma (FREYA)

Run by Copenhagen Studies on Asthma in Childhood · NCT06560255 · Data updated 2026-11-12

This study is testing if taking high-dose fish oil during pregnancy can help reduce the chances of children developing asthma and breathing problems.

More Asthma trials

Quick facts

PhasePhase 3
Study typeInterventional
Ages18 Years to 45 Years
SexWomen only
Enrollment2000 (estimated)
SponsorCopenhagen Studies on Asthma in Childhood
Academic / other
Locations1 site (Gentofte Municipality)
StatusRecruiting
StartedDecember 20, 2024
Main results expectedOctober 2026
Study endsMarch 2033
Registry record updatedSeptember 30, 2025
Trial IDNCT06560255 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are pregnant women in Denmark before 26 weeks of gestation with low EPA+DHA levels.

Probably not a fit

Patients with planned fish oil supplementation or those with certain health disorders like endocrine, heart, kidney, or autoimmune conditions may not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This study aims to evaluate the effectiveness of high-dose fish oil supplementation during pregnancy in reducing the risk of early childhood asthma and related respiratory issues. Pregnant women with low levels of EPA and DHA will be randomly assigned to receive either fish oil or a placebo starting at 24 weeks of gestation until one week after delivery. The study will track the health outcomes of their children for three years, focusing on asthma, respiratory infections, and other related conditions. Maternal blood samples will also be analyzed for genetic and metabolic factors that may influence outcomes.

Why it matters

Potential benefit: If successful, this approach could significantly reduce the incidence of asthma and related respiratory conditions in children.

How similar studies have gone: Other studies have explored the role of omega-3 fatty acids in pregnancy, but this specific high-dose approach is relatively novel.

Who can join: the full rules

Show full inclusion / exclusion criteria
* Pregnant Danish women before week 26 with blood levels of EPA+DHA below 4.7% of total fatty acids
* No planned use of fish oil supplementations
* No endocrine-, heart-, kidney- or auto-immune disorders
* No disorders requiring treatment with blood thinning medication

Where it's running

  • Copenhagen University Hospital of Copenhagen
    Gentofte Municipality, Denmark
    Recruiting

Study contacts

  • Principal investigator: Bo Chawes, PhD — Copenhagen Studies on Asthma in Childhood
  • Study coordinator: Klaus Bønnelykke, PhD
  • Email: kb@copsac.com
  • Phone: +45 38677360

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.