Marginal placenta means that after 28 weeks of pregnancy, the lower edge of the placenta touches the endocervical os, but does not cross the cervical os. Normally, after 28 weeks, the placenta is fixed, and the position of the placenta should be more than 5cm away from the cervical opening, if it is less than 5cm, it belongs to the marginal placenta. With the above situation, there is no need to be too nervous, try to pay attention to bed rest, do not overwork, try to avoid sex. Because sex or overwork, easy to cause marginal placenta previa detachment, easy to cause bleeding. You should pay attention to keep the bowels smooth, do not eat stimulating food, avoid touching the uterine contraction, resulting in bleeding. When you are in the late stage of pregnancy, you should pay attention to observe whether there is bleeding, and if there is more bleeding in the process of giving birth to the baby, you should have a cesarean section.