Diabetics can carry a second child and need to keep their blood glucose under reasonable control. Diabetic patients need to stop oral hypoglycemic drugs during preparation for pregnancy and pregnancy, and should adjust the original treatment program to insulin therapy under the guidance of the doctor to facilitate the transition to pregnancy and maintain the continuity of insulin therapy. If hyperglycemia occurs during pregnancy, it can cause fetal malformations, excessive amniotic fluid and macrosomia in the middle period, and also cause some harm to pregnant women, prone to a variety of acute infections, such as diabetic ketoacidosis, skin infections, and so on. Diabetic patients after pregnancy should control their blood sugar more strictly than other patients to prevent accidents. Regular monitoring of blood glucose and regular checking of the development of the fetus will ensure the healthy growth of the fetus, and consult the doctor at any time of discomfort.