In July 1997, WHO reworked the diagnostic criteria and typing of diabetes mellitus based on the changes proposed by the American Diabetes Association. The new diabetes mellitus typing 1, type 1 diabetes: islet β cell destruction, absolute insulin deficiency, including immune-mediated and idiopathic two types; 2, type 2 diabetes: insulin resistance predominant with insulin relative deficiency, or insulin secretion defect predominant with insulin resistance; 3, gestational diabetes 4, other types or called secondary diabetes mellitus. There are four clinical types of diabetes 1, insulin-dependent diabetes (i.e., type 1 diabetes) Most of the onset is under 30 years of age, but it can also develop in adulthood or even old age, this type of patients have a late onset, the disease is more severe, prone to ketoacidosis, and in severe cases coma Some patients have different degrees of improvement in islet & beta; cell function after insulin therapy. Individual patients can even be treated without insulin for a period of time. 2, non-insulin-dependent diabetes (i.e., type 2 diabetes) Mostly in adults or the elderly, the patient is slow to start, the disease is mild, the body type is mostly obese, plasma insulin levels can be slightly low, normal or high, the incidence of type 2 diabetes is very high, accounting for about 90% of the incidence of diabetes. 3, gestational diabetes refers to women who suffer from diabetes during pregnancy. Clinical data show that about 2 to 3% of women will develop diabetes during pregnancy, the patient’s diabetes disappears automatically after pregnancy. Gestational diabetes is more likely to occur in women who are obese and of advanced maternal age. Nearly 30% of women with gestational diabetes may later develop type 2 diabetes. Note the difference Gestational diabetes: refers to a brief state of diabetes during pregnancy, which disappears after pregnancy. Diabetic pregnancy: refers to a woman who had diabetes before pregnancy and whose diabetes persists after pregnancy. Both gestational diabetes and diabetic pregnancies require careful attention!