Women who are obese while pregnant may put their offspring at risk of childhood diabetes, a condition that requires lifelong insulin therapy, Swedish researchers said Tuesday. “Maternal overweight and obesity in early pregnancy were associated with increased risk of type 1 diabetes in the offspring of parents without diabetes,” a team wrote in Diabetologia, the journal of the European Association for the Study of Diabetes. The highest risk was still for children of parents who had diabetes themselves, the study found. There was no additional risk for children of mothers who were obese on top of having diabetes.