It is not good to have a placenta that is too thick. The thickness of the placenta should be within the normal range. Too thin or too thick placenta is abnormal and may affect the development of the fetus. The thickness of the placenta will not exceed 4 cm. If the placenta is too thick during pregnancy checkups, you need to combine it with fetal heart monitoring and the baby’s physical condition to determine if there are any abnormal reactions. The thick placenta may be caused by abnormal development of the placenta, which can affect the fetal blood supply and lead to fetal hypoxia and also placental abruption. If there are infections in the uterine cavity, such as toxoplasma infection, rubella virus and other infections, it may also lead to placenta thickening, which needs to be tested, and also needs to do the relevant conditioning treatment work.