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NCT00856947 · ClinicalTrials.gov record · last posted 2026-03-19

Vitamin D Supplementation During Pregnancy for Prevention of Asthma in Childhood

Study acronym: ABCvitaminD
StatusActive, Not Recruiting
PhasePhase 1
Started2009-03
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from the ClinicalTrials.gov record
The aim of this study is to prevent asthma symptoms (recurrent wheeze) in childhood by supplementation with high dose vitamin D to the mother during pregnancy. Participants are mothers and children of the ABC (Asthma Begins in Childhood) cohort. Mothers are recruited during pregnancy and receive daily supplement with 2400 IU of Vitamin D3 or placebo from week 24 og gestation to 1 week after delivery. In addition all mothers are advised to take the recommended dose of 400 IU vitamin D daily. The mothers in ABC also participate in an interventional trial with fish oil supplementation, and the vitamin D randomization is stratified by fish oil treatment group. The child is followed with acute and planned vits at the research unit, and wheeze is diagnosed according to predefined algorithms.

Amendment record 17 amendments on the ClinicalTrials.gov record

This ClinicalTrials.gov record has been amended 17 times since 2009-03-05; most recent amendment 2026-03-17. DataLookout shows field-level changes from the day a trial enters its daily monitoring; earlier amendments are counted here from the ClinicalTrials.gov version history. See every version on ClinicalTrials.gov ↗

2011-06-29
Status change Recruiting→Active, Not Recruitingv3
Trial Details
NCT Number NCT00856947
Lead Sponsor Copenhagen Studies on Asthma in Childhood
Conditions Asthma
Enrollment 600 participants
Start Date 2009-03
Primary Completion 2027-07 (estimated)
Study Completion 2027-07 (estimated)
Updated on ClinicalTrials.gov 2026-03-19