The glucose tolerance test is used to test pregnant women for potential gestational diabetes, which is pregnancy-induced diabetes. The American Diabetes Association states that gestational diabetes occurs in as many as 9.2 percent of pregnancies according to a study conducted in 2014.   Gestational diabetes risk factors include prior pregnancies with gestational diabetes, having type 1 or 2 diabetes, a family history of diabetes, a body mass index (BMI) of over 30, and advanced maternal age…