Perinatal Influences on Childhood Asthma

Childhood asthma often arises from a complex interplay of prenatal and early‐life factors that programme airway structure and immune function. Maternal health, nutritional status and exposures during pregnancy can alter foetal lung development and immune maturation via epigenetic modifications. Mode of delivery influences initial microbial colonisation, with caesarean birth delaying exposure to maternal vaginal flora and skewing immune responses towards allergic inflammation. Preterm birth and low birth weight interrupt critical phases of airway growth, increasing susceptibility to hyper‐responsiveness and chronic inflammation. Maternal smoking, allergen exposure and stress in utero heighten pro‐inflammatory signalling, while breastfeeding, optimal maternal diet and appropriate perinatal care can mitigate these risks. Emerging work on cytokine balance and microbiome assembly highlights mechanistic pathways linking perinatal stressors to persistent airway disease, emphasising opportunities for early intervention to curb the rising global burden of paediatric asthma.

Research from Nature Portfolio

Recent studies have illuminated the interplay between birth mode, innate immune programming and early respiratory outcomes. One investigation has shown that caesarean delivery is linked to reduced perinatal production of key pro‐inflammatory cytokines and impaired airway bacterial clearance, predisposing infants to wheezing and reduced lung compliance in the first year of life. Another analysis focusing on elective caesarean section without medical indication has demonstrated an elevated risk of childhood asthma, which is substantially mitigated by exclusive or mixed breastfeeding during the first months of life. These findings underscore the importance of microbial and nutritional exposures immediately after birth in shaping long‐term respiratory health.

Perinatal Influences on Childhood Asthma publication trend

The graph below shows the total number of articles in perinatal influences on childhood asthma across all publications each year (not limited to Nature Index journals).

Technical terms

Perinatal period: The time span immediately before and after birth, typically from 22 weeks of gestation to seven days post partum.

Caesarean section: Surgical delivery of the foetus through incisions in the abdominal and uterine walls.

Gestational age: Duration of pregnancy measured from the first day of the last menstrual period to birth.

Intrauterine growth restriction (IUGR): A condition in which the foetus fails to achieve its genetically predetermined size during pregnancy.

Microbiome: The community of microorganisms residing in a particular environment, such as the infant gut or airway.

Cytokine: Small proteins secreted by immune cells that mediate and regulate inflammation and immune responses.

References

1. Caesarean Section is associated with reduced perinatal cytokine response, increased risk of bacterial colonization in the airway, and infantile wheezing. Scientific Reports (2017).
2. Cesarean section without medical indication and risk of childhood asthma, and attenuation by breastfeeding. PLOS ONE (2017).
3. The association between caesarean section and childhood asthma: an updated systematic review and meta-analysis. Allergy, Asthma & Clinical Immunology (2019).
4. Birth weight, gestational age, fetal growth and childhood asthma hospitalization. Allergy, Asthma & Clinical Immunology (2014).
5. Breastfeeding duration modified the effects of neonatal and familial risk factors on childhood asthma and allergy: a population-based study. Respiratory Research (2021).