The screening time for gestational diabetes refers to all pregnant women undergoing a 75-gram glucose tolerance test between 24 to 28 weeks of pregnancy to measure blood sugar levels and determine the presence of gestational diabetes. However, for pregnant women at high risk, including those with a history of gestational diabetes, delivery of a large fetus, obesity, polycystic ovary syndrome, a family history of diabetes, positive urinary glucose in early pregnancy, or unexplained recurrent miscarriages, fetal malformations, stillbirths, or even a history of childbirth with neonatal respiratory distress syndrome, blood sugar should be monitored as early as possible to understand the situation.