Cesarean birth may boost asthma risk

June 19, 2008 2:13:46 PM PDT
A new study published in the Journal of Pediatrics shows that compared to babies born naturally c-section babies have a 50 percent increased risk of asthma. Experts say the reason may be that babies born this way miss being exposed to a certain bacteria from their mothers. That lack of exposure is detrimental for the development of the immune system.

A second theory is c-section babies have more breathing problems after birth because they are less exposed to stress hormones and compression of the chest.