A normal vaginal ultrasound indicates that there are no structural abnormalities in the uterus and adnexal region, i.e., the uterus, fallopian tubes, and ovaries. Vaginal ultrasound refers to the examination of the uterus and adnexal structures, which includes the uterus, fallopian tubes and ovaries. The fallopian tubes are not visualized under normal conditions and can be observed from under the vaginal ultrasound if lesions occur, such as fluid in the fallopian tubes. The fallopian tubes are muscular structures with a striated shape and cannot be checked for patency by normal vaginal ultrasound. Ultrasound can be performed to check the patency of the fallopian tubes by injecting contrast into the uterine cavity, thus allowing observation of abnormalities in the tubes or areas of blockage, so the absence of abnormalities on vaginal ultrasound only proves that there are no structural problems in the uterus and adnexal region. In order to perform a complete examination, an ultrasound examination of the fallopian tubes is required.