Gestational diabetes refers to the elevated blood glucose levels found during pregnancy. For patients diagnosed with gestational diabetes, we first need to control diet and exercise to manage blood sugar levels, maintaining fasting blood glucose between 4.0-5.3 mmol/L and postprandial (two hours after meals) blood glucose between 4.4-6.7 mmol/L. If blood sugar control can be achieved through diet and exercise, insulin treatment is not required. However, if blood sugar levels still do not meet the standards through diet and exercise, exceeding the figures mentioned earlier, insulin treatment is necessary. For patients receiving insulin treatment, it poses no harm to either the fetus or the mother. In fact, when blood sugar is well-controlled, it can actually reduce the risks associated with gestational diabetes.