C-Sections Shown to Increase Risk of Type 1 Diabetes

"New research¹ reveals that mothers giving birth by Caesarean section have a 20 per cent higher risk of their baby developing Type 1 diabetes in childhood compared to those having natural births, warns leading health charity Diabetes UK.

The research examined 20 published studies on children with Type 1 diabetes born by Caesarean section and found that there was a 20 per cent increase in the risk of babies born by Caesarean section developing Type 1 diabetes. This could not be explained by other factors such as birth weight, the age of the mother, order of birth, gestational diabetes and whether the baby was breast-fed or not.

On average 24 per cent of pregnancies in England are delivered by Caesarean section, which is significantly higher that the World Health Organisation's recommended rate of 15 per cent.²"

From this article here.

The United States has a Caesarean rate of about 30 percent, according to this article.
This article from Childbirth Connection looks at the factors going into that, including care providers who put a low priority on supporting normal labors, side effects of common interventions, and a limited awareness of the risks.