Placental implantation refers to a pathological condition in which the placental villi invade the myometrium and even enter the plasma membrane layer, and is one of the rarer but serious diseases in obstetrics and gynecology. Under normal circumstances, there is a layer of tissue separating the embryo from the myometrium at the time of implantation, and the placenta can be delivered intact when the fetus is delivered at term. Placenta implantation is a condition in which the placenta cannot be delivered naturally after the birth of the fetus, and can only be removed by scraping the uterus or by hand. The main reason for placenta implantation is that the chorionic tissue of the placenta passes through the myometrium or plasma membrane layer of the uterus, causing the placenta to be unable to detach automatically. There are many factors that can lead to placenta implantation, such as scarred uterus, history of abortion, history of freehand placenta detachment, placenta praevia, and advanced age. Placental implantation can cause maternal hemorrhage, uterine perforation, secondary infection, shock and other serious consequences. Ultrasound during pregnancy is the first choice of screening for placenta implantation. Pregnant women are advised to undergo regular checkups during pregnancy, and to seek prompt medical attention after experiencing abdominal pain, vaginal bleeding and other uncomfortable symptoms to avoid serious consequences.