Placental malnutrition usually occurs in late pregnancy, and the uterine height is found to be lower than the same gestational week during regular obstetric examination, and the ultrasound indicates that the fetal growth index is smaller than the actual gestational week, and there is no clinical method to improve placental malnutrition. If the fetal movement is good, the electronic fetal heart monitoring response is good, and the fetus is growing every two weeks by ultrasound, it can be expected until after 35 weeks. If the fetus stops growing for three weeks or if the fetus has intrauterine hypoxia, terminate the pregnancy at any time. Placental dystrophy is mainly seen in patients at risk of hypertension in pregnancy. If there is a previous history of hypertensive disorders in pregnancy, a family history of hypertension in mother and sisters or blood pressure >130/80 mmHg in early pregnancy, oral low-dose aspirin starting at 12 and 16 weeks of pregnancy is recommended to prevent the development of placental dystrophy.