Ultrasound pelvic imaging is a new technique to better visualize the morphology and patency of the fallopian tubes and the morphology of the uterine cavity. A tube is placed into the cervix and a mixture of metronidazole and dexamethasone is injected into the uterine cavity to create an area of fluid in the Douglas fossa. The area of fluid is punctured with a puncture needle under ultrasound guidance and saline is injected to provide a good visualization of tubal morphology, and a transvaginal ultrasound scan after swelling of the uterine cavity with saline provides a good visualization of the uterine cavity. This technique is used to show the patency of the fallopian tubes and the morphology of the umbilical ends. It can also be used to determine abnormalities of the uterine cavity and lining. When is this test available? 1 .Ultrasound detects intrauterine occupancy If an intrauterine mass is detected by ultrasound, its type and size can be determined before surgery by visualization. The most common types are benign endometrial polyps, fibroids or endometrial thickening. 2.Checking the causes of infertility and habitual abortion Ultrasonography can detect benign endometrial polyps, uterine adhesions and other causes that hinder pregnancy. Habitual miscarriage may be due to intrauterine fibrous septum or abnormal morphology of the uterine cavity. These are difficult to detect with normal ultrasound, but become clear with ultrasonography. 3. Determining whether the fallopian tubes are obstructed Obstruction of the fallopian tubes is a common cause of infertility. Uterine tubal imaging is a modified form of ultrasound imaging that makes the uterus more recognizable under ultrasound by injecting fluid into the uterine cavity, which we can see as it passes through the fallopian tubes, thus showing whether there is obstruction. When should this test not be performed or should be withheld? 1. serious diseases of vital organs that cannot tolerate surgery; 2. bleeding and coagulation disorders or bleeding tendencies; 3. acute infections with body temperature over 37.5°C; 4. untreated vaginitis; 5. severe cervicitis or cervicitis; 6. uncontrolled psychosis; 7. pelvic and abdominal malignancies or suspicious; 8. severe cardiac arrhythmias or cardiopulmonary function that cannot be tolerated; When should the test be performed? When should the examination be performed? Generally, the imaging time is 2-5 days after menstruation, if the cycle is disturbed, it will be performed when the proliferating endothelium does not exceed 6 mm. What are the features of ultrasound pelvic imaging: clear visualization of the fallopian tubes and pelvic cavity, assessment of the function and morphology of the fallopian tubes, preliminary determination of the need for tuboplasty, preliminary determination of the uterine cavity, no exposure to X-rays, prohibition of sexual intercourse during the bleeding period, no need for long-term contraception, pregnancy in the same month, unblocking of mild adhesions in the fallopian tubes, can be performed on an outpatient basis without hospitalization. Does the procedure cause pain? No hospitalization, anesthesia, painful bouts are required. About 2% of women experience discomfort similar to menstrual flow during or shortly after the examination.