When a fertilized egg dies at a certain stage of development and stops growing, it is called fetal arrest. After fetal arrest, the pregnant woman feels that the fetal movement disappears and the uterus shrinks instead of increasing in size. As the body’s estrogen level decreases, the early pregnancy reaction, such as breast swelling, nausea, vomiting and fatigue, will be reduced or disappear. In addition, the body may reject the embryo, there may be irregular bleeding or dark red discharge from the vagina, and some people may experience pain in the abdomen or a feeling of anal swelling. During the ultrasound, the fetal heartbeat may disappear, the fetal body may be deformed, and the blood HCG test may show a decreasing trend and a low progesterone level. However, because each person’s constitution is different, there are some people who do not feel anything after embryonic abortion. Therefore, it is recommended that those who are more than 42 days after menopause should go to the hospital for an ultrasound of the uterine appendages to detect the development of the fetal heartbeat and the gestational sac to rule out the possibility of ectopic pregnancy and embryonic abortion. If the test confirms the diagnosis of fetal abortion, abortion should be induced. Before inducing labor, coagulation tests such as platelet count and clotting time should be performed to prepare for blood preparation and transfusion, and for suspected intrauterine infection, antibiotics should be used to prevent infection.