The position of the placenta should be fixed at 28 weeks of pregnancy. Before 28 weeks, you should try to pay attention to rest and not to stand for a long time, and if the placenta appears to be low, you can put your buttocks up during rest, thus facilitating the upward movement of the placenta position. If the placenta position is still low after 28 weeks of pregnancy, it cannot be changed because the position of the placenta has been fixed. If the placenta position is determined to be low after 28 weeks, care should be taken not to exercise strenuously and to avoid sexual intercourse in general, otherwise painless uterine bleeding may occur at any time and this symptom will persist. Repeated bleeding can occur during pregnancy due to some kind of stimulation or excessive exercise, and in severe cases it can lead to haemorrhage and cause anemia. During this period, you should pay attention to the ultrasound examination when you are close to the due date to clarify whether you can have a normal delivery or not, and if you cannot have a normal delivery, you should have a cesarean section in time.