When the lower edge of the placenta covers the endocervix at nine weeks’ gestation without vaginal bleeding, it can be observed for the time being and rechecked regularly, but when vaginal bleeding and other symptoms appear, it is necessary to stay in bed to protect the fetus. Ultrasound examination at nine weeks of pregnancy suggests that the lower edge of the placenta covers the endocervix, suggesting that the position of the placenta is low, and when there are no symptoms such as vaginal bleeding, you should rest appropriately, prohibit coitus, and review the situation regularly. However, if vaginal bleeding occurs, you need to stay in bed under the guidance of the doctor to protect the fetus, when the bleeding is heavy, you can follow the doctor’s instructions to give hemagglutinin and other drugs to stop bleeding treatment and penicillin and other antibiotics to prevent infection treatment. Early pregnancy should pay attention to appropriate rest, avoid strenuous exercise and exertion, but also continue to follow the doctor’s advice to take folic acid on time. When the placenta position is low in early pregnancy, with the increase of gestational weeks and the enlargement of the uterus, the placenta can be restored to the normal position. However, when the ultrasound examination after 28 weeks of pregnancy still indicates that the placenta is still in a low position, placenta praevia can be diagnosed, and it is necessary to strengthen the management of pregnancy.