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Vitamin d study aims to protect Moms-to-Be

NCT ID NCT05329428

Knowledge-focused Sponsor: Göteborg University 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
Running, but no longer taking on new participants.
Completed This study
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 26, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study looked at how much vitamin D pregnant women need to reach healthy levels. 105 women at risk of deficiency took either 20 or 40 micrograms of vitamin D daily throughout pregnancy. Researchers measured their vitamin D levels and other health markers to see which dose worked best.

What this could mean

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

Active substance
Vitamin D3 (cholecalciferol) supplements
What this could lead to
If successful, this could help set better vitamin D guidelines for pregnant women, reducing deficiency-related complications.
What could go wrong
This is a small, completed study focused on measuring vitamin D levels, not on preventing pregnancy complications. Results may not apply to all populations.

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

105 people

The number who actually took part.

Started

Apr 2022

Finished

Sep 2024

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 45 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: * pregnant women in gestational week \<15 Exclusion Criteria: * multi-fetal pregnancy * known disorder to the metabolism of vitamin D, calcium or phosphate (e.g. adrenal gland disorders, kidney disease) * ongoing treatment with vitamin D of ≥10 µg/day * difficulties understanding the study information

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Conditions

The condition(s) this trial relates to.

pregnancy disorder vitamin D deficiency

As listed by the trial registrant

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

Pregnancy complications Vitamin D deficiency Vitamin D3 deficiency

Contacts and locations

Locations

  • Antenatal Care

    Gothenburg, Sweden

More trials for these conditions

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