Forceps birth delivery, allergic sensitisation and asthma: a population-based cohort study

Area of Science:

• Obstetrics and Gynecology
• Pediatric Allergy and Immunology
• Epidemiology

Background:

• Caesarean section delivery is linked to increased allergy risk in children, potentially due to altered immune development from reduced exposure to maternal microbiota.
• The association between other obstetric interventions and childhood allergies remains largely unexplored.

Purpose of the Study:

• To investigate the relationship between forceps-assisted delivery and the development of atopy and asthma in offspring.
• To determine if obstetric interventions beyond caesarean birth influence allergic disease development.

Main Methods:

• A population-based cohort study of 1037 individuals born in 1972/73.
• Atopy assessed via skin-prick tests at ages 13 and 32; asthma history collected at the same ages.
• Statistical analysis adjusted for sex, birth head circumference, parental atopy, birth order, and socio-economic status.

Main Results:

• Forceps-assisted birth was associated with higher prevalence of atopy at ages 13 (53% vs. 44%) and 32 (68% vs. 59%).
• Children born via forceps showed increased asthma rates at ages 13 (21% vs. 11%) and 32 (23% vs. 16%).
• Most associations were not statistically significant after adjusting for confounding factors, except for asthma at age 13.

Conclusions:

• Forceps-assisted delivery shows a potential association with increased risks of atopy and asthma.
• Adjusted analyses revealed weaker associations, suggesting confounding factors may play a role.
• The link between caesarean birth and atopy might be due to confounding, not solely altered microbial exposure; difficult labor factors also warrant consideration.