Gestational diabetes, which occurs during pregnancy, is marked by high blood sugar levels that might be due to hormone changes, and insulin resistance. In fact, moms with this type of diabetes may need up to three times as much insulin during pregnancy than before or after.
Women who develop gestational diabetes are likely to face the same issue with future pregnancies. These women also tend to develop type 2 diabetes later in life— the link may be explained by the similar risk factors for both type 2 and gestational diabetes.
Being more than 20 percent overweight increases the risk of diabetes. Losing weight can help avoid diabetes altogether, though pregnant women should not attempt to lose weight unless under the direction of a health care professional.