Uterine ultrasound is clinically known as gynecologic ultrasound and generally examines women for organic lesions in the uterus, fallopian tubes and ovaries. Gynecologic ultrasound can be done either as an abdominal ultrasound with urine holding or as a vaginal ultrasound without urine holding, both of which can detect organic lesions of the uterus and adnexa. They can usually detect fibroids, endometrial polyps, thickness of the endometrium, follicle monitoring, normal or abnormal intrauterine ring position, endometriosis, uterine abnormalities, fluid accumulation in the fallopian tubes or significant thickening of the fallopian tubes, ovarian cysts, chocolate cysts, ovarian teratomas, tubal pregnancy and pelvic masses. Gynecological ultrasound is also commonly used to check the position of the gestational sac, the development of the gestational sac, to help determine whether there is ectopic pregnancy, whether there is residual uterine cavity after abortion, and to check the development of the fetus during pregnancy. In conclusion, gynecologic ultrasound is a common gynecologic examination method, painless and non-invasive, and can diagnose some common gynecologic organic lesions, such as uterine fibroids, abnormal ring position, fallopian tube and ovarian tumors and pelvic masses. If necessary, it can be combined with pelvic CT to make a comprehensive judgment. However, for ectopic pregnancy, vaginal uterine ultrasound is a little more accurate, while transabdominal or transrectal gynecologic ultrasound is recommended for women with some abnormal uterine bleeding.