The uterus is an inverted pear in shape, slightly flattened at the front, and is located in the pelvic cavity. The uterus can be divided into four parts: the cervix, the isthmus, the body, and the fundus. The uterus can be divided into four parts: the cervix, the isthmus, the body, and the fundus. The lower part of the cervix connects to the vagina, which secretes alkaline mucus that prevents bacterial invasion on the one hand and promotes sperm movement on the other. The isthmus of the uterus is the narrower part of the cervix and body of the uterus. The body of the uterus is more spacious and is where the fetus stays and can also produce menstruation. Its endometrial layer can undergo cyclic changes and shed to produce menstruation. The fundus of the uterus is located at the upper end of the uterus and can determine the number of weeks during pregnancy. If you feel uncomfortable in the uterus, you should go to the hospital in time to improve the relevant examination and treat the symptoms under the guidance of the doctor.