Glucose screening and glucose tolerance are both designed to detect gestational diabetes, and the differences between glucose tolerance and glucose screening include a different scope and a different testing process. Glucose screening is short for Gestational Diabetes Screening, which is used to check blood glucose status during pregnancy and to screen for diabetes. If the blood sugar is too high, it will need to be lowered. When the glucose screening does not pass, that is, when the blood glucose value is greater than or equal to 7.8 mmol/L, then further glucose tolerance test is needed. There is a difference in the testing process between glucose tolerance and glucose screening. 12 hours of fasting is required before the glucose screening test, and glucose powder is dissolved in 200 ml of water and consumed within 5 minutes. 1 hour later, blood is drawn to check the blood glucose. Glucose tolerance test also need to fast for 12 hours before the test, the first blood test blood sugar, and then dissolve glucose powder in water and drink it within 5 minutes, 1 hour, 2 hours, 3 hours after the blood test again. The above is the difference between glucose tolerance and glucose screening, note that after drinking sugar, you should follow the prescribed time to draw blood for testing, so as not to affect the accuracy of the test results. If the test result diagnoses diabetes, you should follow the doctor’s instructions to actively treat it.