Utero-rectal recess is a normal anatomical site and is not a disease. In women, the uterus is located in front of the rectum, both with the original tissues very close to each other. The tissue forms an angle between the tissue and the tissue, which is the lowest point of the abdominal cavity. If there is blood or fluid in the abdominal cavity, it can be easily monitored in the depression area, which is a normal physiological anatomical depression, not a disease, and it is not possible to talk about the appearance of disease manifestations. This depressed area has some clinical importance and is a typical anatomical term. If there is pelvic and abdominal bleeding, the fluid in the depression area can be penetrated after posterior fornix puncture, which is clinically useful for diagnosing the nature of pelvic fluid.