Colposcopy refers to colposcopy, and ultrasound refers to transvaginal B-mode ultrasound, which are not the same, and the difference lies in the type, purpose of examination and indications. 1. Colposcopy: colposcopy belongs to medical devices, which can be divided into optical colposcopy and electronic colposcopy, and is mainly used for checking cervical-vaginal-vaginal-vaginal tissues, targeting at people who have abnormal results of cervical cancer screening, as well as those who have recurrent bleeding after sexual intercourse or unexplained vaginal bleeding, and also as a follow up examination of pre-cancerous lesions of the reproductive tract after treatment. 2. Transvaginal B-mode ultrasonography: Transvaginal B-mode ultrasonography is a medical examination, which mainly passes through the vagina and utilizes the physical properties of ultrasonography to clarify gynecological diseases and pregnancy. Clinically, it can diagnose early pregnancy, ectopic pregnancy, as well as uterine fibroids, endometrial cancer, ovarian tumors, ovarian cancer, pelvic abscesses and other diseases. All in all, it is recommended that women of childbearing age undergo regular gynecological examinations and actively cooperate with their doctors in case of any abnormalities.