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Influence of Probiotics on Early Gut Microbial Colonization

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Editor's note
C-section delivery disrupts the bacterial seeding that typically occurs during vaginal birth, leaving infants vulnerable to dysbiosis-linked conditions later in life. This emerging trial tests whether targeted probiotics plus vitamin D3 can partially restore normal colonization patterns—addressing a concrete clinical gap where prevention remains superior to later intervention. Neonatologists, pediatric gastroenterologists, and maternal-fetal medicine specialists should track results, as early microbiome rescue could reshape postpartum protocols for the ~30% of infants born surgically.

Source: ctgov · BioGaia AB · NOT_YET_RECRUITING · 2026-05-27

URL: https://clinicaltrials.gov/study/NCT07608341

AI rationale (4/5, tier: emerging): RCT of probiotic intervention on infant gut colonization dynamics post-C-section; longitudinal design with multiple timepoints matches brief priorities.

The goal of this clinical trial is to learn whether daily probiotic drops plus vitamin D3 can improve early gut microbiome colonization in healthy infants born by C-section. It will also assess safety and tolerability.

An intervention with probiotics + vitamin D3 will be compared to placebo + vitamin D3 in a double-blind, randomized design, and include an open-label vaginal-born reference group.

Participants will receive study drops daily for 8 weeks and provide stool samples at multiple time points and complete questionnaires/diaries. After the intervention period, there is an optional follow-up period for up to 3 years.

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Published 2026-05-28 · Last kit-update 2026-05-28