Soft birth canal abnormalities can be diagnosed by gynecologic ultrasound, which is a medical test that patients are frequently exposed to during their visits. It is widely used in obstetrics and gynecology, especially for the diagnosis of pelvic masses, and is the preferred method of diagnostic imaging. The uterus and ovaries have a good acoustic interface, and when the lesion is proliferating and enlarged, it mostly contains fluid or has an envelope with a clear interface. Preparation for the examination: Drink plenty of water before the examination without urination so that the bladder is fully filled to show the uterus and adnexa well. Normal sonogram of the uterus and adnexa Longitudinal view of the uterus is located behind the bladder. The uterus is slightly flattened anteriorly and posteriorly and has an inverted pear-shaped structure with the tip of the cone pointing downward. The body of the uterus is a substantial homogeneous structure with smooth contour lines and a homogeneous fine internal light spot, which sometimes shows a more reflective light band of the uterine cavity. In adult women, the uterus is approximately 7-8 cm in length, 4-5 cm in width, and 2-3 cm in wall thickness. 2.5-3 cm of the cervix is visible below the uterus. The normal ovary is about 2.5×2×1cm in size and is a substantial image with faint internal echogenicity and uniform fine light spots. Pathologic sonogram of uterine leiomyoma, uterine corpus carcinoma, chorioepithelial carcinoma, ovarian cyst, ovarian plasmacytoma, ovarian mucinous cystadenoma, malignant substantive tumor of ovary, and benign substantive tumor of ovary. Requirements for the examination: A full bladder is required. Please drink 1000-1500ml of water (or various beverages) 1-2 hours before coming to the hospital. Do not urinate after drinking water to make the bladder moderately full for the examination. Unsuitable people: Non-invasive examination, no unsuitable people for the time being. Normal: 1. Measurement of longitudinal uterine diameter (upper and lower diameter): (1) Measuring section: sagittal section of the uterus. The symmetrical sections from the uterine fundus to the endocervix, myometrium and endometrium should be clearly shown. (2) Measurement position: uterine body: distance between the outer edge of the uterine fundus and the endocervix. Cervix: the distance between the endocervix and the ectocervix. (3) Normal value: uterine body 5.0 soil 1.0 cm. cervical 2.5-3.0 cm. 2. measurement of the transverse diameter of the uterine body (left and right diameter): (1) measurement of the section: coronal section of the uterus. The uterus should be cut transversely and measured in the middle of the uterine body, when the image is in the largest oval section (not at the triangular image). (2) Measurement position: the maximum right and left diameter through the uterine body. (3) Normal value: 4.3 soil 0.73 cm. 3, the uterus for anterior and posterior diameter measurement (also measuring the distance between the outer edge of the two layers of the endometrium before and after): (1) measurement section: the same as the longitudinal measurement plane of the uterus. (2) measurement position: perpendicular to the longitudinal meridian of the uterus, measuring the maximum anterior and posterior distance. (3) Normal value: 4.3 ¼ 0.9 cm. Abnormalities: uterine fibroids, uterine corpus carcinoma, chorioepithelial carcinoma, soft birth canal abnormalities, ovarian cysts, ovarian plasmacytic cystadenoma, ovarian mucinous cystadenoma, ovarian mucinous cystadenoma, benign substantive tumors of the ovary, malignant substantive tumors of the ovary.