After the fetus has reached a certain stage of development in the mother’s body, the fetal heart and fetal bud will appear, which is the heart of the fetus. However, it does not mean that fetal heart and fetal bud will not occur again after the fetal heart and fetal bud are present, but there is still a possibility of fetal abortion due to various factors, but the chance of fetal abortion is relatively small. It has a lot to do with the physical condition of the pregnant woman, the development of the fetus, and whether the blood type of the parent and child match. When a woman has an ultrasound after pregnancy, the presence of a fetal bud and heartbeat indicates that the gestational sac is alive, but this is not the basis for whether or not fetal abortion will occur later. If all conditions are normal, the chances of fetal abortion are very low. However, if the pregnant woman is in poor health, she may have a low progesterone or other maternal diseases after she has a fetal heartbeat and a fetal bud. In addition, if the fetus is poorly developed, it will also miscarry on its own, which is the law of nature and there is no way to change it. In addition, if the fetus is not compatible with the mother’s blood type or both sexes have chromosomal abnormalities, it will also increase the chance of fetal abortion after having a fetal heart and germ. Therefore, it is impossible to have an exact figure of the chance of fetal abortion after having a fetal heartbeat, but it is only possible to say that the chance of fetal abortion is relatively lower in this case.