The glucose tolerance and 4D examination can be done at the same time. When doing the 4D examination, the time should be between 22-26 weeks of pregnancy, and the glucose tolerance examination should be between 24-28 weeks, the two pregnancy weeks are basically the same time, you can choose the middle time period between 22-27 weeks, the results of the examination within this time basically will not have a great error. You should not eat too much fatty food or sweet food within two weeks of the glucose tolerance test. On the first day of the glucose tolerance test, no food or water should be consumed after 12:00 p.m., and on the second day, blood should be drawn after 8:00 a.m. The glucose tolerance test should be done first after entering the hospital, and after that, you should eat sweets or chocolate in moderation and drink more soups, such as light soup or millet porridge, which can increase fetal excitability and promote fetal activity, and then do the 4D ultrasound test, which is conducive to The best position to see more clearly.