The length of a normal female vagina is about 8-12 cm and the entire vagina can accommodate about two fingers loosely. Due to the presence of the vaginal folds, the length and width of the vagina increases significantly during sexual intercourse, especially in women who have a normal normal normal delivery, the entire fetus can be delivered through the vagina, which is the delivery channel for the fetus and the channel for menstrual blood flow. However, due to the congenital growth and development of the vagina, the possibility of vaginal stenosis is not excluded.