During pregnancy, high blood sugar can be prevented through lifestyle regulation and regular checkups. 1. Lifestyle regulation: It is recommended that women maintain a reasonable weight level before pregnancy, neither underweight nor overweight and obesity. After pregnancy, you can adjust the diet, so that the three nutrients in a reasonable proportion, so as to avoid over-nutrition, but also appropriate exercise to maintain a reasonable rate of weight gain. 2. Regular obstetrical examination: If a woman has a poor maternal history, family history of diabetes, advanced age or overweight, obesity and other high-risk factors, it is recommended that blood glucose monitoring, and actively control the diet, in order to prevent the occurrence of gestational diabetes. During pregnancy, women should do a good job of regular checkups, close monitoring of blood glucose, there are abnormalities need to consult a doctor in a timely manner.