In general, when a pregnant woman fails the glucose tolerance test, there is usually no need to review the test, and the blood sugar needs to be controlled under the guidance of the doctor, and the specific needs to follow the doctor’s instructions. Glucose tolerance screening is the main diagnostic method to screen for the presence of diabetes during pregnancy. Gestational diabetes mellitus (GDM) can be diagnosed when the result suggests a failure, and it is usually not necessary to repeat the test. Since unstable blood glucose control in GDM increases the risk of gestational hypertension and macrosomia, it is necessary to keep blood glucose under control under the supervision of a doctor. If GDM can be controlled through diet and exercise, the pregnancy can be terminated by induction of labor under close monitoring until the due date. For those who need insulin therapy to control blood glucose, if the blood glucose control is stable, the pregnancy can be terminated after 39 weeks of gestation; if the blood glucose control is not stable, the pregnancy can be terminated under close monitoring to ensure the safety of mother and baby.