Gestational diabetes refers to hyperglycemia that either develops or is first identified during pregnancy, including previously unrecognized glucose intolerance and diabetes prior to pregnancy. Typical symptoms of gestational diabetes include frequent urination, increased thirst, and increased hunger, or recurrent vulvovaginal candidiasis. High vigilance for gestational diabetes is warranted if the pregnant woman weighs over 90 kilograms, or if the current pregnancy is complicated by excessive amniotic fluid or a macrosomic fetus. The danger of this condition is that, in severe cases or where blood sugar control is poor, it can easily lead to miscarriage and preterm birth, as well as infections, and in severe cases, may lead to ketoacidosis. Treatment involves two aspects: one is dietary control, and for patients who cannot control their diet effectively, insulin treatment can be used. (Medication should be used under the guidance of a doctor.)