The posterior placenta has little to do with the ease of normal delivery. The posterior placenta belongs to the normal position of the placenta. Usually, as long as the placenta is not low, not attached to the lower part of the uterus, and the distance from the cervical opening is more than 7cm, the posterior placenta is easier to deliver. In the case of placenta praevia, it can usually be checked around 28 weeks of pregnancy. If the placenta covers the inner cervical opening at this time, it needs to be considered placenta praevia, which will affect the normal delivery. Whether a pregnant woman can have a normal delivery depends on the size of the fetus, the condition of the pelvis and the position of the fetus. If the size of the fetal head is compatible with the pelvis, and the fetal position is in line with the birth canal, the fetal head will pass through the birth canal first, then it will be easier to deliver the baby. If the fetus has abnormalities, or if the fetus is cephalopelvic disproportionate, breech-first or shoulder-first, it will be difficult to deliver the fetus smoothly, and there may be some risks, so the doctor will consider cesarean section or other methods to help the mother deliver the baby.