In some patients, the examination reveals a low placenta position and panic during early pregnancy ultrasound. At 11-14 weeks of early pregnancy, the percentage of placental margins reaching or covering the internal cervical os at ultrasound was 42%. By 20-24 weeks, the percentage was 3.9%. At full term, the percentage is 1.9%. Why? Because as the uterus increases in size, most placenta positions gradually move upward. Therefore, the diagnosis of placenta praevia cannot be easily made in the early and middle stages of pregnancy, only the low placental position. If placenta praevia is diagnosed, does it need to be hospitalized depending on the following three points? 1.No bleeding or a small amount of bleeding in the middle of pregnancy, temporarily do not need to be hospitalized for observation. 2.Hospitalization if there is a lot of bleeding. 3. Hospitalization in late pregnancy. Can I have a natural delivery with placenta praevia? If there is no bleeding during pregnancy, partial placenta praevia with the edge of the placenta greater than 20mm from the inner cervical opening, if there is no other contraindication to vaginal delivery, you can try to deliver the placenta with blood preparation, partial placenta praevia with the edge of the placenta 0-20mm from the inner cervical opening, there is still a chance of vaginal delivery, but close observation of vaginal bleeding, the chance of cesarean delivery increases for complete placenta praevia, cesarean delivery is recommended for placenta praevia with a history of anterior cesarean delivery A history of placenta praevia should be taken into account for placental implantation.