Cesarean delivery, antibiotic exposure, and probiotics: relationship with childhood asthma.

摘要

I read with great interest the article by Ly et al. The authors have described that the risk for atopy, asthma, and allergic rhinitis has been associated with cesarean section (CS) delivery, perhaps because of a lack of exposure to the maternal vaginal flora, gut flora, or both during normal delivery. However, this issue is still unresolved, as study results have been contradictory (some studies showing increased risk/association, while others not). But in the largest birth cohort study including 1,756,700 singletons,