In the third trimester of pregnancy the fetus has developed and the bones and placenta have formed, so if the pregnancy is terminated it needs to be induced. Induced abortion has a very large impact on women’s health and carries certain risks, so it is necessary to be hospitalized for induced abortion in the middle trimester. Oral mifepristone combined with intra-amniotic injection of ethacridine is commonly used, and the embryo is usually expelled within 1-2 days after the drug is administered. Because of the different physique or sensitivity to the drug, there are some differences, and before using the drug, you need to check the ultrasound, electrocardiogram, blood routine as well as coagulation time, blood type, liver function, kidney function and so on. After the operation, you should pay attention to rest, avoid overwork, pay attention to keep warm, do not eat cold, stimulating food, pay attention to observe the bleeding, after the operation, you should follow the doctor’s instructions to take medication, regular review.