Pregnant women do glucose tolerance in order to know the blood sugar level in the body, check for abnormal sugar metabolism and whether they have diabetes or not. Pregnant women do glucose tolerance test examination, can understand the body’s metabolism of blood sugar in the body, so that you can determine the level of blood sugar in the body. If the glucose tolerance test results are significantly higher, it may be gestational diabetes or gestational diabetes mellitus resulting in the manifestation of lesions, these diseases on the health of pregnant women as well as the healthy growth of the fetus may cause significant harm, the need for early detection and early treatment. During pregnancy, pregnant women should not only do glucose tolerance test, but also regularly do all the other pregnancy checkups as well as the malformation checkups, so that the condition can be detected and diagnosed and treated in a timely manner. Pregnant women should undergo glucose tolerance test under the guidance of obstetricians and gynecologists.