A glucose tolerance test can be done at 29 weeks of pregnancy. Generally, the recommended gestational week for the glucose tolerance test is 24-28 weeks of pregnancy. If you miss this optimal gestational week, it is possible to do it at 29 weeks of pregnancy, and the diagnostic criteria are the same. Generally, you cannot eat or drink after 10 pm the day before the glucose tolerance test, and it is best to do it on an empty stomach the next day to ensure the accuracy of the test results. Glucose tolerance, also known as oral glucose tolerance test (OGTT), is a laboratory test to diagnose diabetes. A glucose tolerance test is done during pregnancy, mainly to determine whether a pregnant woman has gestational diabetes. The results of the glucose tolerance are basically independent of the week of pregnancy. A glucose tolerance test done at 29 weeks of pregnancy can effectively determine the blood glucose status of a pregnant woman and screen her for gestational diabetes. The common reference values for gestational diabetes are fasting blood glucose less than 5.1 mmol/L, 1 hour after taking sugar less than 10.0 mmol/L, and 2 hours after taking sugar less than 8.5 mmol/L. If one of these three values exceeds the normal reference value, gestational diabetes is diagnosed. If you are found to have gestational diabetes, you need to manage your diet and exercise according to your own pre-pregnancy body mass index, height and standard weight, the condition of the mother and fetus, and the pregnant woman’s own eating habits under the guidance of your doctor. Generally, fasting blood glucose is recommended to be controlled between 3.3-5.3mmol/L, and blood glucose 2 hours after meal is controlled between 4.4-6.7mmol/L. Through diet adjustment and appropriate activities, generally 90% of pregnant women’s blood glucose can return to normal range. If the blood sugar is still high, additional insulin treatment is needed. Pregnant women should pay attention to regular pregnancy check-ups and not miss the best time for various examinations so as not to be able to clarify the specific situation of the fetus. Eat more fresh vegetables, fruits and seafood on a daily basis to supplement nutrition and enhance physical fitness during pregnancy.