The vagina of a woman is in the range of 7-12 cm. The length of the vagina varies from person to person, as long as it is within the normal range, there is nothing to worry about. The vagina is the channel for menstrual discharge and fetal delivery. Pregnancy and childbirth tend to change the vagina, and the length of the vagina changes with each delivery, which can lengthen the length of the vagina. If the length of the vagina is less than 7cm, it is a small vagina and may be congenital dysplasia. It is best to go to a regular hospital for treatment, which can be corrected by surgery. If you don’t pay attention to hygiene, it is easy to have vaginal infection, which can lead to vaginitis, and if vaginitis is serious, it can cause intrauterine infection, so it is better to have regular checkups.