Gestational diabetes mostly occurs in mid to late pregnancy and is associated with the secretion of multiple insulin-antagonizing hormones by the placenta. Insulin antagonistic hormones lead to decreased insulin sensitivity and increased resistance, which in turn leads to increased blood glucose in pregnant women. Patients with gestational diabetes need to adhere to a reasonable diet, exercise and, if necessary, be treated with subcutaneous insulin injections under the guidance of a physician. Patients with gestational diabetes can usually return to normal blood glucose within a few days to a few weeks after delivery, but a few patients will have persistent disorders of blood glucose metabolism. Gestational diabetes mellitus actually contains two concepts: one is diabetes mellitus that has been diagnosed before the pregnancy, and the pregnancy occurs after the diagnosis, called gestational diabetes mellitus; and the other is gestational diabetes mellitus that has normal blood sugar before the pregnancy, because of the special state of pregnancy, which causes the blood sugar to increase, this is called true gestational diabetes mellitus GDM. blood glucose will return to normal. In the case of previously diagnosed diabetes, the blood glucose remains high at the end of the pregnancy and requires continued treatment. However, it is important to note that even with GDM, there is a percentage of women who can evolve into true type 2 diabetes afterwards and will need lifelong treatment. Patients with gestational diabetes need to have relevant tests performed 6-12 weeks after delivery to assess the status of glucose metabolism.