Scientists believe that babies born via Cesarean section have a different set of microbes in their digestive tract than those born from the vagina.
Previously, scientists have linked C section born babies with a higher risk of asthma, diabetes, and obesity - but they weren't sure why.
Lucky scientists waded through 24 different 3-month-old babies and found differences in babies that were delivered in different ways, but also between those that were formula fed and breastfed.
Basically when a baby is vaginally delivered - they experience a whole bunch of bacteria that C section babies don't. Thus this helps them develop a tougher immune system.
Here's what a scientist said:
"These are the seeding species and lay the foundation for the next groups of microbes to come. They are critical for priming the newborn's immune system to learn which agents are potentially dangerous and which, particularly those on foods, can be given a pass.
Breast feeding also resulted in a change in microbes, with formula-fed babies showing more Peptostreptococcaceae bacteria and Clostridium difficile. In adults, C. difficile infection is associated with diarrhea and unpleasant side effects, and while babies don't seem to be as affected by the bacteria, the presence of C. difficile could push out the Escherichia and Shigella that are so critical to developing a strong and healthy immune system."
It is still unclear if the differences in bacteria actually lead to asthma diabetes, and obesity - but this is definitely something for them to continue working on and hopefully discover an answer in the future!!