A single umbilical artery with a strong light spot in the left ventricle may be a normal phenomenon, or it may be caused by abnormalities in the fetal heart structure, etc. The latter requires further treatment. 1. Normal phenomenon: If the single umbilical artery of the fetus only has a strong light spot in the left ventricle, there is no intracardiac structural and functional abnormality, and at the same time, the development of the fetus is normal, it may be caused by the development of the fetal heart during the process of different calcium deposits. In this case, no special treatment is needed, and regular monitoring of fetal heart ultrasound is sufficient to observe the intracardiac structure and function. 2. Fetal cardiac structural abnormality: If congenital cardiac structural and functional abnormality is found in the fetal period, it is usually abnormal, and further examination and diagnosis are needed to take appropriate measures. Therefore, if there is a strong light spot in the left ventricle of the single umbilical artery of the fetus, and at the same time there is an abnormal cardiac structure, it is recommended to consult a doctor in time, and under the guidance of the doctor, improve the relevant examination, clarify the cause of the disease and treat the symptoms.