The cervix is located in the vaginal part of the uterus and can be seen when the vagina is opened through a speculum, while the uterine cavity is not visible when the vagina is opened through a speculum. The uterine cavity is the part connected to the cervix and is located in the pelvic cavity. The endometrium in the uterine cavity undergoes cyclic changes in response to the ovary’s periodic secretion of estrogen and progesterone, which clinically results in retractive bleeding, manifested as menstruation. The endometrium in the cervical canal will not change with the menstrual cycle. Therefore, when the uterus is completely removed, even if the cervix is left, menstruation will not occur clinically. If the cervix is relatively loose, it often leads to the possibility of spontaneous abortion if pregnancy occurs, so it is important to do the appropriate gynecological examination before pregnancy.