Pregnant women who have abnormalities in the first glucose tolerance screening have to undergo diet and exercise control and have their glucose tolerance retested again 5-7 days later. The procedure for the second glucose tolerance test is the same as the first one, which requires fasting for 12 hours, drawing blood once in the morning on an empty stomach, drinking 75g of glucose water, and drawing blood one hour and two hours after drinking the sugar water to check blood glucose. It is also recommended to check glycosylated hemoglobin. If glycosylated hemoglobin and glucose tolerance are not abnormal, no treatment can be done. If there are abnormalities in glycosylated hemoglobin, fasting blood sugar, and blood sugar after drinking sugar water, gestational diabetes can be identified. You need to control your diet during pregnancy to lower your blood glucose and monitor your blood glucose in a timely manner and control it with medication if necessary.