Restoring gut bacteria in infants born by cesarean section
Official title: "Restoration of the Gut Microbiome After Cesarean Section (RestoreGut)" - A Double-blinded Randomized Placebo-controlled Trial
Run by Copenhagen Studies on Asthma in Childhood · NCT06264219 · Data updated 2026-11-12
This study is testing a new treatment to help restore healthy gut bacteria in infants born by cesarean section to see if it can improve their immune system development.
Quick facts
| Phase | Phase 1 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years and up |
| Sex | Women only |
| Enrollment | 80 (estimated) |
| Sponsor | Copenhagen Studies on Asthma in Childhood Academic / other |
| Locations | 2 sites (Gentofte Municipality, Copenhagen and 1 other locations) |
| Status | Recruiting |
| Started | August 2, 2024 |
| Main results expected | August 30, 2027 |
| Study ends | August 30, 2027 |
| Registry record updated | October 7, 2026 |
| Trial ID | NCT06264219 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates for this study are infants born via cesarean section who are less than 38 weeks gestational age and whose mothers meet specific health criteria.
✕Probably not a fit
Patients who may not benefit from this study include those with chronic health conditions or those who have recently used antibiotics.
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 develop a therapy to restore the gut microbiome in infants born via cesarean section (CS) by conducting a randomized, placebo-controlled feasibility trial. The intervention involves mother-to-infant fecal microbiota transplantation (FMT) and virome transfer (FVT) to help correct microbial imbalances caused by CS delivery. The study will assess whether these interventions can help the infants' microbiomes resemble those of vaginally born infants, which may support healthier immune system development. The trial will include infants born at less than 38 weeks gestation and will monitor various health outcomes related to microbial colonization.
Why it matters
Potential benefit: If successful, this approach could lead to improved gut health and immune function in infants born via cesarean section.
How similar studies have gone: Other studies have shown promise in using microbiome restoration techniques, but this specific approach is novel and untested.
Who can join: the full rules
Show full inclusion / exclusion criteria
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
Where it's running
-
Copsac, DBAC
Gentofte Municipality, Copenhagen, Denmark Recruiting -
Rigshospitalet
Copenhagen, Denmark Not yet recruiting
Study contacts
- Study coordinator: Jakob Stokholm, MD, PhD
- Email: stokholm@copsac.com
- Phone: +45 38677360
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How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.