Pregnant women with high blood glucose in the course of pregnancy may get diabetes, because there are clear diagnostic criteria for pregnant women in the special stage of gestational diabetes, and this criterion is that pregnant women undergo an oral glucose tolerance test. Fasting blood glucose>5.1mmol/L, one hour after meal blood glucose>10mmol/L, two hours after meal blood glucose>8.5mmol/L, as long as one of these three criteria can be diagnosed as gestational diabetes. Therefore, the diagnosis of this stage is more strict compared with the general diagnosis of diabetes, which means that gestational diabetes is easy to reach for many pregnant women with high blood sugar, but do not be afraid. Timely lifestyle intervention and insulin therapy, if necessary, can normalize blood glucose control, and the characteristic of gestational diabetes is that pregnant women’s blood glucose can return to normal after giving birth to a child.