Rectovaginal fascia

The rectovaginal fascia (Rectovaginal septum or the female equivalent of Denonvilliers' fascia) is a sheet of connective tissue situated between the posterior vaginal wall and the anterior rectal wall. It serves as a supportive structure that separates the urogenital compartment from the digestive compartment in the female pelvis.

The rectovaginal fascia lies immediately beneath the vaginal mucosa and is composed of dense collagen, smooth muscle bundles, and a network of heavy elastin fibers. Its principal attachments are peripheral: superiorly, it merges with the cardinal - uterosacral ligament complex; laterally, it fuses with the fascia overlying the levator ani muscles along a well-defined line that converges with the arcus tendineus fasciae pelvis; and distally, it merges into the perineal body. The lateral attachment extends from the perineal body toward the arcus tendineus fasciae pelvis, forming a characteristic Y-configuration approximately midway between the pubis and the ischial spine.