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Published on: January 9, 2026
Mother-to-offspring microbial vertical transmission: timing, determinants, and impact on offspring susceptibility to
Ruqiao Duan1,2,3, Kun Wang1,2,3, Liping Duan1,2,3
1Department of Gastroenterology, Peking University Third Hospital, Beijing, China.
Insights
Mother-to-offspring microbial transmission shapes the early-life microbiome. Understanding transmission routes and influencing factors is key for preventing infant dysbiosis and related diseases.
Area of Science:
- Microbiology
- Human Microbiome
- Developmental Biology
Background:
- The early-life microbiota is crucial for infant health and development.
- Mother-to-offspring microbial vertical transmission is a primary determinant of the infant microbiome.
- Disruptions in early microbial colonization are linked to various health issues.
Purpose of the Study:
- To synthesize current knowledge on mother-to-offspring microbial vertical transmission.
- To examine the timing, determinants, and health implications of this transmission.
- To review potential interventions for disrupted microbial transmission.
Main Methods:
- Comprehensive literature review of studies on maternal-infant microbial transmission.
- Analysis of evidence regarding prenatal, intrapartum, and postnatal transmission routes.
- Evaluation of factors influencing microbial transmission and their impact on the infant microbiome.
Main Results:
- Evidence for prenatal transmission remains debated, while intrapartum (birth) and postnatal (breastfeeding) transmission are well-established.
- Delivery mode, gestational age, feeding practices, and antibiotic exposure significantly modulate microbial transmission.
- Interventions like probiotics and microbiota transplantation show promise in restoring healthy microbial patterns.
Conclusions:
- Vertical microbial transmission is fundamental to intergenerational microbiome inheritance.
- Targeting vertical transmission offers a potential therapeutic strategy for preventing early-life dysbiosis.
- Optimizing early microbial colonization is vital for long-term infant health outcomes.
Abstract:
The establishment of the early-life microbiota is profoundly shaped by microbial vertical transmission from mother to offspring. This review synthesized the current understanding of the timing, determinants, and health implications of mother-to-offspring microbial vertical transmission. We detailed the contentious evidence regarding prenatal microbial transmission and highlighted the well-established roles of intrapartum and postnatal transmission via birth and breastfeeding, respectively. Multiple factors, including delivery mode, gestational age, feeding patterns and antibiotic exposure, are critical modulators of microbial transmission, shaping the initial microbial community. Emerging intervention strategies, such as breastfeeding, probiotic supplementation, vaginal microbiota transplantation, and fecal microbiota transplantation, offer promising avenues for restoring a healthy microbial trajectory when natural transmission is disrupted. This review underscores that vertical transmission is the cornerstone of intergenerational microbiome inheritance and a potential therapeutic target for preventing early-life dysbiosis and associated diseases.
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