After pregnancy, if the fertilized egg is low lying, i.e. the placenta is low lying or placenta praevia. Whether the pregnancy persists to full term or not needs to be evaluated on the basis of the fetus and the mother’s specific situation. If the placenta does not rise after 28 weeks of pregnancy and remains in the lower part of the uterus, or even reaches or covers the inner cervical opening at the edge, this is considered placenta praevia, which is classified as central placenta praevia, marginal placenta praevia, etc. Placenta praevia is the most important cause of late pregnancy bleeding, and once bleeding or lower abdominal distension occurs, it can cause preterm labor, placental abruption, hemorrhage and other risks. If placenta praevia is diagnosed, the number of weeks it can last varies from person to person and is closely related to the position of the placenta or the size of the fetus. Usually, if there are no obvious symptoms, the pregnancy can be continued until full term before further termination, while paying attention to iron supplementation in the diet, preferably eating liver or blood products twice a week and red meat every day to prevent anemia. In case of iron deficiency anemia, it is important to take oral or intravenous iron supplements as prescribed by the doctor. If there is painless vaginal bleeding without any cause, you need to go to the hospital immediately, absolutely rest in bed, closely monitor the fetal heartbeat and fetal movement, especially when combined with lower abdominal distension, hard belly and other contractions can easily lead to premature labor or preterm delivery, if the amount of bleeding is high, it will cause shock, intrauterine distress of the fetus, and in serious cases, it will lead to fetal death in the womb, once it happens, you need to end the delivery by cesarean section as soon as possible. If the delivery is less than 34 weeks, it is necessary to suppress the contractions and to promote fetal lung maturation symptomatically, and to be ready to terminate the pregnancy. In conclusion, once the diagnosis of placenta praevia is confirmed, you need to maintain a good mood and state of mind, and seek immediate medical attention if you experience any uncomfortable symptoms. Pay attention to the cleanliness and hygiene of the vulva to avoid retrograde infections such as bacteria that may lead to premature rupture of membranes, which may aggravate or induce preterm labor. If there are no uncomfortable symptoms, the life of the mother and child can usually be effectively safeguarded by adhering to the pregnancy until full term.