Glucose tolerance is not optional for pregnant women and is highly recommended from a eugenic perspective. Generally speaking, pregnant women are in the period of 24 to 28 weeks of pregnancy, to do glucose tolerance screening. Glucose tolerance screening during pregnancy can detect abnormalities in glucose metabolism during pregnancy and can diagnose whether you are suffering from gestational diabetes, and early detection and early treatment is beneficial to the development of the pregnant woman and the fetus. With the gradual improvement of living standards, the chances of pregnant women suffering from gestational diabetes will gradually increase, and suffering from gestational diabetes is harmful to the mother as well as the fetus, so it is necessary to carry out the appropriate screening in the prenatal period, and if there are no special circumstances, it is a mandatory program during pregnancy. Glucose tolerance test during pregnancy can understand the blood sugar situation of pregnant women, which is conducive to early detection and control, it is generally recommended that pregnant women do glucose tolerance test at 24~28 weeks of pregnancy, and do all the tests on time.