Diabetes screening, referred to as glucose screening, is an important screening test for pregnant women during their maternity checkups at 24-28 weeks, mainly to determine the presence of gestational diabetes. In particular, pregnant women who are relatively obese, or who have a family history of diabetes or a history of bad pregnancies and deliveries, need to be actively screened for clarity. If the test results show the presence of gestational diabetes, it may have an impact on both the fetus and the pregnant woman. Most gestational diabetes has no obvious manifestations and is easily overlooked by pregnant women, so glucose screening tests are necessary. If the diagnosis is confirmed, blood glucose examination, blood glucose monitoring and control should be carried out as soon as possible, and the fasting blood glucose of pregnant women should be controlled within 5.1mmol/L, and the blood glucose two hours after meal should be controlled within 8.5mmol/L. If the blood sugar exceeds the standard, it may cause intrauterine growth restriction, giant baby and other pregnancy complications, so it is recommended to follow the medical advice for blood sugar management in time.