Pregnant women with fasting blood glucose 5.1mmol/L generally need to control sugar. Gestational diabetes diagnostic criteria for glucose tolerance test fasting blood glucose ≥ 5.1mmol / L, 1 hour after taking sugar ≥ 10.0mmol / L, 2 hours after taking sugar ≥ 8.5mmol / L, meet one of the above criteria can be diagnosed as gestational diabetes. If a pregnant woman’s fasting blood glucose is 5.1mmol/L, generally suggests that it is abnormal, need to control the diet, staple food as much as possible to coarse and fine with the main, to avoid sweets, fried food and other excessive intake, with moderate exercise, and closely monitor the blood glucose changes, such as more than the upper limit of the need for glucose-lowering treatment. Pregnant women who have abnormal fasting blood glucose must seek medical attention in a timely manner and intervene under the guidance of a doctor to avoid adverse consequences.