Why is there no fetal heartbeat detected with a fetal bud of over 10mm?

Generally, the fetal bud is 10 millimeters, but if the fetal heartbeat has not been detected, it is necessary to consider the issue of embryonic arrest. If the fetal heartbeat cannot be seen on B-ultrasound, the possibility of embryonic arrest will be relatively high, as usually 35 to 40 days after pregnancy, women can see the gestational sac in the uterine cavity, and 40 to 50 days later, the fetal heartbeat and fetal bud can be seen. If there is still no fetal heartbeat after more than 50 days, an early examination should be performed. 1. If the diagnosis is embryonic arrest, the next step is to terminate the pregnancy. However, it should be noted that there are many factors that can lead to embryonic arrest. After the first embryonic arrest, it is also necessary to understand these factors during the next pregnancy preparation. A comprehensive physical examination should be conducted first to ensure a good physical foundation for carrying a healthier baby. 2. However, some women may not detect the fetal heartbeat initially due to late implantation. In this case, they can delay one or two weeks before undergoing a re-examination to see if there is a fetal heartbeat. If the fetal heartbeat is still not detected after more than 50 days, it can be basically determined as embryonic arrest, and the pregnancy should be terminated promptly to avoid further harm to health. 3. As a woman, whether you are newly pregnant or throughout the pregnancy, you should regularly check your own and your fetus's physical health status. Only by detecting problems in time and taking targeted treatment measures can you reduce the threat to the fetus.