Gestational diabetes is a form of diabetes that develops in some women during pregnancy, usually toward the end of pregnancy. Like the other types of diabetes, it is characterized by the body's inability to process glucose adequately.
Gestational diabetes affects approximately 3 percent to 5 percent of all pregnant women. In most women, the disorder goes away when the pregnancy ends, but women who have had gestational diabetes are at increased risk to eventually develop type 2 diabetes.