Embryonic arrest, also known as missed miscarriage, refers to a condition during early pregnancy where if no fetal heartbeat is detected by ultrasound during weeks 8 to 9 of pregnancy, it should be diagnosed as embryonic arrest. Embryonic arrest indicates that the gestational sac has ceased to live, and in such cases, efforts to preserve the pregnancy are pointless as they are meaningless. However, it is important to analyze the reasons behind embryonic arrest to guide future pregnancies. Common causes of embryonic arrest include abnormalities in chromosomes, infections, immunity, and rheumatological markers. When embryonic arrest occurs, tests should be conducted targeting these indicators to clearly identify the abnormal factors, thereby guiding and potentially increasing the success rate of subsequent pregnancies.