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C-Section babies may get a microbial boost from mom

NCT ID NCT06264219

Disease control Sponsor: Jakob Stokholm Source: ClinicalTrials.gov ↗

What the study statuses mean

This study's is highlighted.

Recruitment status, easiest to join first

Recruiting now This study
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
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 Results may not be published yet.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This status has not been confirmed recently, so it may be out of date.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 29, 2026 · Last updated Jun 30, 2026 · Updated 1 time

Summary

This study tests whether transferring gut microbes from a mother to her baby after a cesarean section can restore the infant's gut microbiome to resemble that of a vaginally born baby. Researchers will give some infants a fecal transplant (containing bacteria or viruses) and compare their gut bacteria to those receiving a placebo or born vaginally. The goal is to see if this early intervention is feasible and can help prevent health issues linked to C-section births.

What this could mean

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

Active substance
Fecal Microbiota Transplantation (FMT) and Fecal Virome Transplantation (FVT)
What this could lead to
If successful, this approach could help restore the gut microbiome in C-section babies, potentially reducing risks of allergies, asthma, and other immune-related conditions later in life.
What could go wrong
This is an early-phase feasibility trial with only 80 participants, so results may not be generalizable. The long-term safety and effectiveness of transferring microbes or viruses to infants are not yet known.

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 80 people

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

Started

Aug 2024

Expected to finish

Aug 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: * Gestational age \< week 38+0 days * Proficient in spoken/written Danish * Single pregnancy (no twins or triplets) * Pre-pregnancy BMI between 18.5 and 35 kg/m2 * No chronic intestinal, endocrine, cardiac, or kidney disorders * No known gestational complications (gestational diabetes, preeclampsia, gestational hypothyroidism) * No regular use of prescription medication or any drugs that, in the research team's opinion, may interfere with the study's results. * Willingness to abstain from giving the child products with probiotics (fermented dairy like yogurt or A38 are allowed). Exclusion Criteria: Maternal: * Use of antibiotics within one month of stool donation * Acute gastroenteritis within one month of stool donation * Use of antibiotics within one month of birth * Time since last travel abroad relative to data of fecal donation according to the requirements for blood donations ("Regler for tappepauser" - blooddonor.dk) * Positive test results for pathogens during donor material screening. * Antibiotic treatment at birth (vaginal births only) * Spontaneous onset of labor or emergency cesarean section before scheduled cesarean section. Infant: * Instances of major birth defects or intrauterine growth retardation (IUGR) * Infants requiring pediatric support at the time of transplant administration

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Conditions

The condition(s) this trial relates to.

infectious disease

As listed by the trial registrant

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

Microbial colonization

How to take part

Only the study team decides who joins. These are the ways to reach them.

  1. The places running it

    2 sites. The list below names each one and where it is.

  2. The official record

    ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.

    Open the record ↗

  3. A doctor treating you

    A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.

Contacts and locations

Locations

  • Copsac, DBAC

    RECRUITING

    Gentofte Municipality, Copenhagen, 2820, Denmark

  • Rigshospitalet

    NOT_YET_RECRUITING

    Copenhagen, 2100, Denmark

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