The anterior wall of the placenta near the cervical opening affects with little bleeding or no symptoms, or there may be hemorrhage, etc. 1. Small amount of bleeding or asymptomatic: the placenta’s anterior wall close to the cervical os is a manifestation of placenta previa, which may have a small amount of vaginal bleeding symptoms, or asymptomatic. At this time, it has little effect on the fetus and the pregnant woman, but you need to perform regular ultrasound examinations, keep an eye on the relationship between the placenta and the cervical os, and pay close attention to the amount of bleeding, but if there is obvious bleeding, the situation is dangerous, and you should consult a doctor immediately. 2. Hemorrhage: placenta praevia may cause painless hemorrhage, which causes anemia in pregnant women, and in severe cases, hemorrhagic shock, resulting in insufficient blood supply to the fetus, endangering the life of the fetus and pregnant women. Therefore, pregnant women with placenta praevia should be hospitalized in time to prevent accidents if contractions do occur once full-term or not.