Under normal circumstances, the appearance of the fetal buds is 6-7 weeks of pregnancy and the appearance of the fetal heart is 7-8 weeks of pregnancy. Fetal buds are a state of the embryo that must appear in the process of growth and development, while the fetal heart is the primitive heartbeat that appears after the buds, and the appearance of fetal buds and the fetal heart in the corresponding period of time mostly indicates that the development of the embryo is normal. In early pregnancy to determine whether the development of the gestational sac is normal, the main thing is to do ultrasound to determine whether the gestational sac of fetal heart and fetal buds, as long as the presence of fetal heart and fetal buds, it means that the gestational sac has survived. However, it does not mean that the fetus will grow and develop normally or that there will be no embryonic arrest. Because the growth and development of the gestational sac is not stable in early pregnancy, in many cases, even if the fetal heart and buds have appeared, there is still a possibility of miscarriage or embryo abortion. Therefore, the appearance of fetal heart and buds only indicates that the embryo development is relatively stable in this period, but still can not be overly careless, need to pay attention to monitoring blood HCG, daily observation of abdominal pain and vaginal bleeding and other discomforts, and at the same time, regularly come to the hospital for regular obstetrics, so as to ensure that the growth and development of the fetus during pregnancy is normal, to avoid accidents.