The absence of a fetal heartbeat on a negative ultrasound may indicate that the fetus has stopped developing, but this should be considered in the context of the gestational week of the mother. Fetal heartbeat usually occurs at 6-9 weeks, before this time there is no fetal heartbeat in the ultrasound, which is normal. If the pregnancy is already more than 7 weeks, no fetal heart is considered to be the possibility of embryonic arrest, the first thing to do is to verify the pregnancy week of the pregnant woman, if the pregnancy week is correct, then consider the fetal arrest, you can repeat the examination after one week, if necessary, terminate the pregnancy and carry out the removal of the uterus and other treatments. Ultrasound examination is more intuitive than abdominal ultrasound, the examination must be in a regular hospital to find a professional ultrasound doctor to ensure safety, and find abnormalities in time to seek treatment of obstetricians and gynecologists.