It may be normal to see no visible heart tube pulsation at more than 6 weeks, but embryonic arrest cannot be ruled out. This can be handled by observation and termination of pregnancy. At about 6 weeks of pregnancy, the gestational sac has just entered the uterus, and most of the fetal heart and buds are still immature, so when doing the examination, the gestational sac can be seen, but no obvious heart tube pulsation is seen, and the pregnant woman mostly has no other uncomfortable symptoms, which is normal, and generally 1 week later to review the ultrasound can be. However, if the pregnant woman in the pregnancy of vaginal bleeding, abdominal pain and other uncomfortable symptoms, more than 6 weeks of pregnancy test did not see obvious heart tube pulsation, may suggest that the embryo stops developing. At this point, the pregnancy may be terminated if necessary. If there is still no obvious heartbeat at more than 6 weeks, it is recommended to consult a doctor in time, complete the relevant examinations, identify the cause of the disease, and treat the symptoms.