Babies born via C-section have worse immune systems
the verdict
SUPPORTED
the evidence backs this
confidence 87/100
Multiple systematic reviews and microbiome studies indicate that cesarean section delivery alters initial microbial colonization, which plays a critical role in shaping the developing infant immune system and is associated with a higher risk of immune-mediated disorders.
Evidence for · 11
Early Microbes Modify Immune System Development and Metabolic Homeostasis—The “Restaurant” Hypothesis Revisited
2017 · cited by 92
The paper discusses how cesarean sections alter offspring microbiota composition, potentially impacting long-term immune health.
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More for · 10
Intervention strategies for cesarean section–induced alterations in the microbiota-gut-brain axis
2017 · cited by 91
It links mode of delivery and subsequent microbial alterations to the development of immune-related conditions like asthma and allergies.
The Impact of Cesarean Section Delivery on Intestinal Microbiota: Mechanisms, Consequences, and Perspectives—A Systematic Review
2024 · cited by 83
This review highlights how cesarean section delivery leads to distinct microbial compositions linked to immune-related disorders.
Role of cesarean section in the development of neonatal gut microbiota: A systematic review
2021 · cited by 65
It demonstrates that cesarean section-born infants exhibit different gut colonization patterns, which contribute to immune system development differences.
Dynamics of Gut Microbiota According to the Delivery Mode in Healthy Korean Infants
2016 · cited by 45
The study notes that delivery mode alters early gut microbiota dynamics, which are known to affect immune and allergic disease risks.
The importance of gut microbiome in the perinatal period
2024 · cited by 36
It reiterates that delivery methods influence microbiome composition and diversity, which have significant implications for immune system development.
Neonatal Immune System Ontogeny: The Role of Maternal Microbiota and Associated Factors. How Might the Non-Human Primate Model Enlighten the Path?
2021 · cited by 35
It outlines how mode of delivery influences infant microbiota and subsequently the ontogeny and maturation of the immune system.
Early-life gut microbiome development and its potential long-term impact on health outcomes
2025 · cited by 25
The review notes that cesarean delivery-induced gut dysbiosis can alter developmental programming and predispose individuals to immune and inflammatory conditions.
The Influence of Cesarean Section on the Composition and Development of Gut Microbiota During the First 3 Months of Life
2021 · cited by 25
It establishes that cesarean section significantly disrupts normal gut colonization patterns during the first months of life.
Impact of the maternal microbiome on neonatal immune development.
2025 · cited by 9
It discusses how the absence of vaginal microbiome exposure during cesarean delivery has potential long-term implications for offspring immunity.
Exploring the Microbial Landscape of Neonatal Skin Flora: A Comprehensive Review
2024 · cited by 4
It emphasizes that the mode of delivery impacts microbial establishment, influencing foundational immune system development.