For women without high-risk factors, the general practice is to conduct a 75g glucose tolerance test between 24 to 28 weeks of pregnancy, measuring fasting blood glucose, blood glucose one hour after glucose ingestion, and blood glucose two hours after glucose ingestion. The fasting blood glucose should not exceed 5.1 mmol/L, blood glucose one hour after glucose ingestion should not exceed 10.0 mmol/L, and blood glucose two hours after glucose ingestion should not exceed 8.5 mmol/L. For women with high-risk factors, it is advisable to screen for blood glucose levels during the first prenatal visit to detect gestational diabetes early, control blood sugar levels, and reduce the occurrence of complications. Who are the women considered to be at high risk? Those who have a history of gestational diabetes, history of delivering a macrosomic infant, are obese or have polycystic ovary syndrome, have a family history of diabetes among first-degree relatives, are found to have positive fasting and ketone bodies early in pregnancy, have a history of unexplained recurrent miscarriages, have a history of fetal anomalies and stillbirths, and those who have a history of delivering newborns with respiratory distress syndrome. These women need to undergo diabetes screening after becoming aware of the pregnancy to detect any abnormality in blood sugar levels early and treat accordingly.