The cost of a negative ultrasound is usually around$100. Currently, the charge for a vaginal ultrasound in a domestic tertiary hospital is$110. Yin ultrasound, also called intracavernous ultrasound, is a method of ultrasound diagnosis by placing the ultrasound probe into the vagina, which is especially suitable for observing the lesions of pelvic organs in the pelvis. Negative ultrasound can observe uterine occupying lesions, such as fibroids and adenomyosis. It can measure the thickness of the endometrium and observe whether there are polyps in the endometrium, and it can also observe whether the position of the birth control ring is normal. Diagnosis is also clear for adnexal diseases, such as ovarian cysts, teratomas, polycystic ovaries, and malignant tumors. For the fallopian tube hydrocele is also very clear, especially suitable for ovulation monitoring, for ectopic pregnancy diagnosis rate, especially greater than the transabdominal ultrasound. Compared with abdominal ultrasound, negative ultrasound has clearer images, higher resolution, more accurate results, and the examinee does not have to hold his/her urine. If a patient needs to have a negative ultrasound, it is recommended to go to a regular hospital, as the fees charged by regular hospitals are more reasonable and the results are relatively more accurate.