Gestational diabetes refers to the absence of a diabetes history before pregnancy, but during pregnancy screening (Tang screening), blood sugar abnormalities are discovered. At this point, the diagnosis of gestational diabetes is made. The criteria for diagnosing gestational diabetes are based on a diabetes screening test conducted at 24-28 weeks. If the fasting blood glucose is ≥5.1, one-hour blood glucose is ≥10.0, or two-hour blood glucose is ≥8.5, meeting any one of these criteria is sufficient for a gestational diabetes diagnosis.