Gestational diabetes mellitus can usually return to normal, while some may remain in hyperglycemia for life, which is related to factors such as heredity, dietary habits, obesity, and treatment effects. Gestational diabetes mellitus is due to a series of physiological changes in pregnant women, increased glucose needs, increased insulin resistance and insufficient insulin secretion resulting in diabetes, most patients postpartum glucose metabolism returned to normal after the return to normal, blood glucose, but there are still some patients may be in the future development of type 2 diabetes mellitus, this may be related to heredity, dietary habits, obesity, the effectiveness of treatment and other factors. Women with gestational diabetes mellitus should seek medical treatment in a timely manner, and it is recommended that a glucose tolerance test be performed after delivery to rule out the presence of diabetes mellitus.