Fasting blood sugar of 5.9 mmol/L in pregnant women does not require insulin. Most people with elevated blood sugar during pregnancy can lower their blood sugar by controlling their diet and exercising appropriately. Most people can lower their blood glucose through diet and exercise management and do not need insulin injections. The standard of blood sugar control during pregnancy is 3.3-5.3mmol/L in fasting, 1 hour after meal should be below 7.8mmol/L and 2 hours after meal should be below 6.7mmol/L. While controlling blood sugar, we should also avoid the occurrence of hypoglycemia. Pregnant women should also pay attention to balanced nutrition while controlling their diet. They can appropriately reduce the intake of carbohydrate food and appropriately increase the intake of protein food, and exercise appropriately after meals to maintain their weight and not to make their weight rise too fast if their physical condition allows.