The severity of the lower edge of the placenta covering the endocervical opening at 23 weeks of pregnancy needs to be seen if it is accompanied by bleeding during pregnancy. The lower edge of the placenta to the endocervical opening indicates that the placenta is in a low position, a state of placenta previa. Placenta previa is prone to increase the risk of bleeding and miscarriage during pregnancy, so if you find that there is a lower edge of the placenta covering the inner cervical opening during pregnancy, you need to review your checkups on time, pay more attention to rest, and observe whether there are any bleeding, abdominal pain, and other symptoms on a regular basis. Some pregnant women are advised to pay attention to the change of placenta position as the uterus enlarges and the original low lying placenta position gradually moves up to normal position or improves during pregnancy checkups. If there is a low placenta, you need to pay attention to avoid coitus during pregnancy, improve the regular obstetric examination, avoid exertion during the whole pregnancy, if there is abnormal bleeding phenomenon, then it is recommended to consult a doctor in a timely manner, and if necessary, you need to keep the baby on birth control treatment, bed rest.