When high blood sugar in late pregnancy causes fetal growth retardation, it needs to be improved by adjusting the dietary structure and reasonable medication, after which the growth and development of the fetus should be closely observed. Pregnant women can lower their blood sugar by eating more food with crude fiber and less food with high sugar content. At the same time, reasonable exercise to promote physical health. You can also choose the right insulin and other suitable hypoglycemic drugs under the guidance of the doctor to reduce the impact of high blood sugar on the growth and development of the fetus and avoid fetal malformation. At this time, if the development of the fetus is delayed, you should actively take measures to intervene, and then conduct regular obstetric examination to observe whether the development of the fetus is back to the normal state. If high blood sugar occurs in late pregnancy, you should go to the hospital in time and take reasonable methods of treatment to minimize the adverse effects on the fetus.