Borderline placenta previa has an effect, but it is usually not particularly serious, and the status needs to be closely probed, and if there are uncomfortable symptoms, then the choice of normal labor or cesarean section should be made according to the doctor’s probing. Placenta previa generally refers to after 28 weeks of pregnancy, the placenta attached to the lower part of the uterus, the lower end of the placenta is close to or covers the cervical internal os, because the position is too low, which in turn may lead to abnormal fetal position in the late stage of the fetus, and to a certain extent, it will affect the normal delivery of the fetus from the vagina, so it is more important. Generally divided into three kinds, complete, partial and marginal, marginal situation is less serious, the edge of the edge reached the internal os, but did not exceed the internal cervical os, this situation can generally be closely observed, do not need to terminate the pregnancy as the above two kinds of. However, once symptoms appear, the pregnancy should be terminated as soon as possible. Some of the borderline placenta previa may gradually move upward with time, while some may remain in the previa. Therefore, close monitoring is required on a daily basis and the choice of normal delivery or cesarean section should be made according to the doctor’s instructions.