Most pregnant women have no obvious symptoms after fetal arrest and need to be clearly diagnosed by hormonal tests combined with early pregnancy ultrasound tests. Without any laboratory tests and examinations, it is impossible to clearly determine whether there is fetal abortion. If embryonic abortion occurs, the following precursors may appear: 1. early pregnancy: before embryonic abortion, there may be bloody discharge from the vagina, which may be manifested as brown discharge or bright red bleeding; or inexplicable lower abdominal cramping, pain and discomfort, as well as nausea and vomiting and other pregnancy reactions reduce or disappear; 2. mid- and late-pregnancy: the precursors of fetal abortion will generally be excessive fetal movement or The fetal movement is too little, fetal movement stops, vaginal bleeding, abdominal pain and other reactions. The possibility of fetal abortion should be considered when the above symptoms appear after pregnancy. Pregnant women need to visit the hospital promptly for ultrasound examination to clarify the diagnosis. If no fetal heartbeat is found during the ultrasound examination, fetal abortion can be confirmed. Once the diagnosis of fetal abortion is confirmed, if the pregnant woman does not have a spontaneous abortion, she needs to undergo surgical curettage in time to remove the aborted fetus and residual tissues in the uterine cavity in order to avoid more serious conditions such as infection and bleeding.