Most cases of placenta hypoplasia at 12 weeks of pregnancy are temporary, and if there are no other high-risk factors, the fetus can usually be born successfully. Because 12 weeks of pregnancy belongs to the early stage of pregnancy, the uterus is small and the placenta is relatively large, the placenta occupies a larger area of the uterine cavity and sometimes inevitably covers the vicinity of the cervical os, but with the development of the fetus, the uterine cavity enlarges and the lower uterine segments are formed, and the placenta will grow upward slowly. Therefore, if the pregnancy is smooth and there is no cephalopelvic disproportion or fetal malposition, the fetus can be born successfully in most cases. Unless the pregnancy is combined with other high-risk factors, such as fetal growth, cephalopelvic disproportion, malposition, or a history of cesarean section and myomectomy, it may be difficult to deliver the fetus during labor and delivery, and the pregnant woman is at a higher risk of placental adhesions, implantation, and fatal hemorrhage, which may require surgery to terminate the pregnancy. When placenta previa is detected in the 12th week of pregnancy, pregnant women should avoid strenuous exercise and abstain from sex to prevent vaginal bleeding. In addition, review should be done every 4 weeks to dynamically determine whether the position of the placenta has changed.