The cost of transvaginal color Doppler ultrasound is around$200-300, and due to geographical differences and hospital level differences, large cities charge more than small counties. Compared with ordinary ultrasound, transvaginal color Doppler ultrasound is a probe that enters the vagina directly and then probes the specific shape of the uterus, with clearer images, a larger viewing angle, without affecting the full bladder, and is not affected by obesity, fat, intestinal gas, and other factors, so that the results of the examination are more feasible. It has a good diagnostic effect for complicated diseases in obstetrics and gynecology, such as: uterine fibroids, adenomyosis, pregnancy, endometrial lesions (mostly tumors). The examination is recommended to be performed 3-7 days after the end of menstruation, and sexual intercourse is forbidden for 3 days before the examination. Moreover, if there is gynecological inflammation, this examination is forbidden to avoid bringing in bacteria and causing gynecological infections.