Gestational diabetes, also known as pregnancy-induced diabetes, generally refers to a condition diagnosed during pregnancy where varying degrees of high blood sugar levels are detected for the first time. This includes some cases where glucose intolerance or diabetes was undiagnosed before the pregnancy. Most patients see their blood sugar levels return to normal after delivery, but regardless of whether the high blood sugar normalizes post-pregnancy, it is considered gestational diabetes. Currently, the diagnostic criteria for gestational diabetes include a 75-gram oral glucose tolerance test. If the fasting blood glucose level is greater than or equal to 5.1 mmol/L, the blood glucose level after one hour is greater than or equal to 10.0 mmol/L, and the blood glucose level after 120 minutes is greater than or equal to 8.5 mmol/L, then gestational diabetes can be diagnosed.