During pregnancy, if fasting blood glucose is >5.8mmol/L (104mg/dl) after regular dietary control, and >6.7mmol/L (120mg/dl) 2 hours after breakfast or before dinner, insulin application may be considered. It is recommended to apply insulin to control blood glucose under doctor’s supervision. In case of elevated blood glucose during pregnancy, first consider lowering blood glucose through lifestyle interventions, e.g., controlling total calorie intake, maintaining a low-sugar, low-fat diet and appropriate postprandial low-to-moderate aerobic exercise, e.g., walking. Insulin therapy may be considered if lifestyle interventions fail to reduce blood glucose concentrations, if fasting blood glucose is >5.8 mmol/L and >6.7 mmol/L 2 hours after breakfast or before dinner; if both fasting and postprandial blood glucose are high, if urinary ketones occur with strict dietary control (so that strict control does not allow for sufficient calorie intake), and if sufficient food intake is only possible with the application of insulin. It is recommended to go to the hospital in case of elevated blood glucose during pregnancy.