Gynecological ultrasound usually refers to the ultrasound examination of the uterine adnexa, which mainly looks at the uterus and ovaries, and can also observe other conditions, as follows: 1. uterus: mainly to see the shape and size of the uterus, as well as whether the myometrium is uniform, whether there are any occupational lesions, such as fibroids and adenomyosis, and whether the thickness of the endometrium is uniform, and whether there are any occupational lesions in the uterine cavity, such as endometrial polyps, uterine longitudinal septum, and whether there are residues in the uterine cavity after abortion. The first thing you need to do is to look at the size of the ovaries and whether there are any cysts or follicles on the ovaries. If there are follicles, it depends on the size and number of follicles. The fallopian tubes are very thin and usually will not be detected by gynecological ultrasound. If there is a lesion in the fallopian tubes, such as hydrocele, the ultrasound will show a salami-like change in the fallopian tubes. If the patient has a history of menopause and no gestational sac is seen in the uterine cavity, ectopic pregnancy should be highly suspected. If a mass is found in the adnexal area, it may be an ectopic pregnancy.3. Others: Patients with amenorrhea, irregular vaginal bleeding or abdominal pain, or even health check-ups, need to have gynecological ultrasound examinations. Ultrasound examination results vary from disease to disease. By asking medical history and combining ultrasound, the gynecologist can make disease judgment and give correct treatment plan.