The vagina is an elastic, muscular canal with a soft, flexible lining that provides lubrication and sensation.
The vagina receives the penis during sexual intercourse and also serves as a conduit for menstrual flow from the uterus.
Vaginal relaxation occurs because of age, childbirth, weight loss and gain. In vaginal relaxation, the muscles are relaxed and have poor tone, strength, and control. The internal and external diameters increase, and the muscles of the perineum are weak and poorly supported.