It is possible to have fetal heartbeat and fetal buds in the second month of pregnancy and still have fetal arrest. Fetal heart and buds can be seen by ultrasound in the second month of pregnancy, which indicates that the embryo has been successfully implanted. However, the embryo will not be in a relatively stable state until it reaches about 6 to 7 centimeters in length after 12 weeks of pregnancy. Therefore, from 8 weeks to 12 weeks of pregnancy, embryonic abruption may still occur. The causes of embryonic arrest are complex, including the embryo’s own factors, maternal factors, environmental factors, etc. If there are chromosomal abnormalities in the embryo itself, then the arrest may be unavoidable; maternal factors such as low progesterone can be prevented by supplementing exogenous hormones, and environmental factors such as poisonous and harmful substances, noise and so on can be avoided as much as possible. If fetal arrest has occurred, the pregnancy should be terminated as soon as possible. It is recommended that pregnant women should pay attention to perinatal health care during pregnancy, and follow the doctor’s instructions to undergo obstetric examination on time in order to detect various abnormalities in a timely manner.