It is good if the ovarian cyst ultrasonography suggests that there is no obvious blood flow signal, indicating a high probability of benign. Physiological ovarian cysts have no obvious blood flow signal and most of them can subside on their own when reviewed after menstruation, so they do not need treatment, as long as they are reviewed regularly. Pathological ovarian cysts are classified into benign, junctional and malignant. The higher the degree of malignancy, the richer the blood flow signal will be. If the tumor markers are elevated and there is an abundant blood flow signal, it indicates a higher possibility of malignancy. If the ovarian cysts do not have abundant blood flow signal, or almost no blood flow, this condition is more likely to be benign.