Fetal heart and fetal buds begin to appear around 7 and 5 weeks after conception, and are part of a process of embryonic development, during which ultrasound is needed to determine this. Embryonic development begins after the fertilized egg is laid, and the embryo develops to the point where the specific structure of the buds can be seen at about 5 weeks, and as the buds gradually develop, the fetal heart can be seen at about 7 weeks of gestation. A combination of blood tests to check HCG and progesterone levels is needed to make a comprehensive judgment. Once abdominal pain and bleeding occurs during pregnancy, it is necessary to consult a doctor in time for observation, combined with the condition of fetal heart and buds, to make a comprehensive judgment on the embryo, after the fetal arrest without spontaneous abortion, it is necessary to carry out abortion under the guidance of the clinician to avoid complications.