The normal thickness of the placenta is about 3.6-3.8cm, not more than 5cm, if more than 5cm is considered to be an abnormal performance, if the placenta is suddenly thickened, most of the disease symptoms, it is recommended to go to the hospital in a timely manner, to carry out an examination, to consider whether there is the possibility of placental abruption. If the placenta is thicker, you need to observe the body at any time, but also to exclude various symptoms such as placental edema, abnormal changes in the placenta may have a direct impact on the growth and development of the fetus, fetal hypoxia or abnormal fetal development and other symptoms. The placenta may also thicken slowly in order to provide nutrients to the fetus, so it is necessary to go to the hospital for examination to see if it is physiological thickening of the placenta or abnormalities, and according to the disease, symptomatic treatment, people with uterine infections or gestational syndromes may also have symptoms of thickening of the placenta.