Gestational diabetes mellitus is one of the types of diabetes mellitus, which refers to women with normal glucose metabolism or potentially impaired glucose tolerance before pregnancy and who first develop diabetes during pregnancy. After the development of gestational diabetes, if the blood glucose is not well controlled or the condition is more serious, it is not only easy to cause miscarriage, premature birth, fetal malformation and other conditions, but also may make the patient patient herself develop symptoms such as ketoacidosis and diabetic lactic acidosis, which is a greater threat to both the fetus and the present. Gestational diabetes and type 2 diabetes are somewhat similar in that they are both related to insulin resistance or insufficient insulin secretion. The increased glucose needs after pregnancy cause the body to develop insulin resistance or insufficient secretion, which eventually leads to high blood sugar. So some of the factors that can lead to type 2 diabetes can also increase the incidence of gestational diabetes, especially in people with significant obesity, a family history of diabetes, a history of impaired glucose tolerance, and other conditions that are at high risk for gestational diabetes. Women with risk factors for gestational diabetes should strengthen their knowledge about gestational diabetes before pregnancy, adjust their mindset and bodies, avoid bad habits such as smoking, alcohol abuse, overeating, and if they are overweight they also need to go on a diet first. Those who are eligible for weight loss metabolic surgery can also choose to have this procedure to reduce their weight, improve their physical condition and reduce the risk of gestational diabetes. However, it is generally not recommended to conceive within one year after weight loss metabolic surgery, because it is a weight loss period for one year after the surgery, and conceiving at this time will affect the weight loss effect of the surgery.