The little yellow girl asked: "Mother Chen, why should sugar tolerance be done at 24-28 weeks of pregnancy?" Wouldn't it be nice to be a little earlier and a little later? ”
The glucose tolerance test, also known as the glucose tolerance test, is a laboratory test used to diagnose diabetes. There are two main types of intravenous and oral, the former is called IVGTT, the latter is called OGTT. This test requires monitoring blood glucose levels on an empty stomach and 1 to 2 hours after drinking sugar water to determine whether there is gestational diabetes.
In clinical medicine, there is no mandatory rule that glucose tolerance tests must be done at 24 weeks of pregnancy.
It is generally recommended to do a glucose tolerance test at 24-28 weeks of pregnancy, mainly because gestational diabetes occurs in the middle and third trimester of pregnancy, premature detection, hyperglycemia is not easy to show, and the fasting blood glucose of pregnant women is mostly normal. The various anti-insulin secretions from the placenta increase rapidly at 24-28 weeks of gestation, and if gestational diabetes is screened for at this time, timely intervention can be made to avoid adverse pregnancy outcomes. For example, complications such as macrosomia, premature babies, and intrauterine distress can be prevented, so it is more accurate to conduct glucose tolerance tests at the 24th to 28th weeks of pregnancy.
It can also be checked in the first trimester if the pregnant woman has abnormal or hyperglycemia symptoms, such as excessive gestational weight gain or a family history of diabetes.
If the optimal glucose tolerance test time is missed during pregnancy, it can be checked at 32-34 weeks of pregnancy, and the placenta secretion of insulin peaks at 32-34 weeks of pregnancy, causing insulin antagonism to become obvious, so it can also be done at this time. Or pregnant women with high-risk factors for diabetes, such as a family history of diabetes, obesity, recurrent candidal vaginitis, a history of births, a history of stillbirth, and hyperhydramnios. Even if glucose tolerance is normal at 24 to 28 weeks of pregnancy, it should be rechecked at 32 to 34 weeks of pregnancy.