Once gestational diabetes is diagnosed, it is necessary to enter into gestational diabetes management, which includes dietary guidance, exercise guidance, self-monitoring of blood glucose, etc. Many pregnant women can mostly meet the blood glucose standard after such formal treatment, but there are still some pregnant women whose blood glucose still cannot meet the standard, and then it is necessary to start insulin in time. However, in reality, many pregnant women are worried about or refuse to use insulin for various reasons, which is certainly understandable. However, if insulin is not used correctly and in a timely manner, the fetus in the womb will grow in an unstable high blood sugar environment for a long time, which will not only increase the perinatal risk of mother and child, but also increase the risk of the child suffering from glucose metabolism disorders in adulthood. Insulin is the only glucose-lowering drug that cannot pass the placental barrier, so it is very safe for the fetus if used correctly under the guidance of a specialist.