The dangerous period for postpartum placenta implantation is the second trimester of pregnancy, which is the second trimester. Placental implantation is the most dangerous during the second trimester and during labor and delivery, generally depending on the depth and profundity of the implant, and may cause postpartum hemorrhage during delivery. Placental implantation is a condition in which the placenta enters the myometrium in order to obtain more nutrients where the placenta was deposited, and the placental villi enter the uterine myometrium in order to obtain more nutrients. After placenta implantation in the middle of pregnancy, it is necessary to take more bed rest, not to sit for a long time, not to stand for a long time, not to do strenuous exercise, and not to have sexual relations or hit the abdomen. If irregular vaginal bleeding or abdominal pain occurs, you must go to the gynecology department of the hospital for a good examination and actively carry out fertility preservation treatment.