Fetal heart is usually formed in 50-60 days of pregnancy, women who have been examined and confirmed to be in the early pregnancy state, if they usually have regular menstruation, the fetal heart and fetal buds can be observed through ultrasound in 7-8 weeks of pregnancy, so as to judge the development of the embryo. If menstrual disorders, the ovulation time will be delayed, and the formation of fetal heart and buds will also be delayed. Usually, the fetal heart and buds can be seen in about 60 days; if the fetal heart is not seen for more than 60 days, it may be an abnormal pregnancy, such as ectopic pregnancy, spontaneous abortion, biochemical pregnancy, etc., and the cause needs to be clarified and then intervene for treatment. Normal fetal heart is regular and strong, in about 17-20 weeks of pregnancy, pregnant women can directly use the stethoscope in the abdomen to hear the fetal heart, usually 120-160 beats / min, if & lt; 120 beats / min or & gt; 160 beats / min, it is necessary to be alert to the possibility of intrauterine hypoxia of the fetus, and should be carried out in a timely manner to assess the cause of the disease. Formation of fetal heart is still in the early stages of pregnancy, when fetal development is still unstable, pregnant women need to pay extra attention, do not exercise strenuously, strengthen the diet and nutrition, it is recommended to eat more fresh vegetables and fruits, to maintain a smooth stool, it is recommended to eat less spicy, stimulating, easy to fire food. It is recommended to do regular ultrasound to observe the development of the fetus, and at the same time, avoid blindly using medication, and stay away from radiation, toxic and harmful and other undesirable environments.