If you have not taken blood glucose test before pregnancy and have insulin resistance before pregnancy, you can do glucose tolerance in advance; if your blood glucose test before pregnancy is normal and you have not been diagnosed with pre-pregnancy diabetes, and only have insulin resistance, you do not need to do glucose tolerance in advance, and you can do it in the 24th to 28th week of pregnancy. For pregnant women who did not have blood glucose testing before pregnancy and have high risk factors for gestational diabetes, such as insulin resistance and high blood pressure, it is recommended that they have glucose testing during the initial prenatal checkup, and regular blood glucose monitoring during the week, which will help to detect and treat blood glucose abnormality in a timely manner, and avoid any adverse effects on the pregnant woman and the fetus. If your blood glucose is normal before pregnancy, and you have not been diagnosed with pre-pregnancy diabetes or gestational diabetes, but only insulin resistance, you can have a glucose tolerance test at 24 to 28 weeks of pregnancy. For pre-pregnancy insulin resistance, early hospitalization is recommended.