Whether or not the placenta can be saved in the third trimester cannot be generalized, but needs to be judged according to the degree of placental abruption. For those with mild placental abruption, medication can be used to prolong the gestation period as much as possible, but if the abruption is severe, the chances of saving the baby are very slim. In the third trimester of pregnancy, i.e., 12 weeks of pregnancy, due to the fact that this is the early stage of pregnancy, the stability of the fetus is poor, the risk of placenta abruption is higher, and it is more difficult to preserve the fetus, so whether the fetus can be preserved or not can not be generalized, and it is necessary to judge according to the actual situation of the pregnant woman. If the degree of placental abruption is mild, placental abruption area is not more than one-third, there is no obvious symptoms of abdominal pain, and the fetal heart is normal, this time the pregnant woman can promptly consult a doctor, it is recommended to hospitalize in a timely manner to preserve the fetus, the doctor will give pregnant women dextroprogesterone, progesterone and other progesterone drugs to inhibit uterine contractions, and try to prolong gestational weeks. However, if the degree of placenta previa is more serious, peeling off more than one-third of the area, and accompanied by obvious vaginal bleeding, abdominal pain, uterine pain and other symptoms, or fetal heart abnormalities or even no fetal heart, if the pregnant woman can not be faster from the vaginal delivery, the need for a comprehensive assessment of the professional physician to comply with the medical advice of timely cesarean section surgery and other means of termination of pregnancy, so as not to affect the safety of life. It is recommended that pregnant women in the third trimester of pregnancy with placenta previa should consult a doctor in time for examination to clarify the specific condition, and then according to their own actual situation, under the guidance of the doctor to choose the appropriate way to preserve the fetus or terminate the pregnancy.