Gynecological ultrasound will have different precautions when given different examination routes, if the gynecological ultrasound examination is performed through the abdomen and ultrasound examination, at this time you need to fill the bladder, you need to drink a lot of water, commonly known as holding urine, so that the bladder is filled up before you can get a clear gynecological ultrasound images. If the ultrasound is performed vaginally, it is not possible to fill the bladder, but to drain the bladder of urine, so it is not possible to hold urine. If the gynecological ultrasound is performed through the rectum, the main purpose is to better understand the situation of the uterus and adnexa, and women who have not had sexual intercourse can have a rectal ultrasound.