The uterosacral ligaments arise from the sacral vertebrate S2,3,4 and attach to the cervical ring posteriorly. It is an effective insertion point of the downward muscle force, the longitudinal muscle of the anus (LMA). The rectovaginal fascia extends as a sheet between the lateral rectal pillars, from the perineal body below to the levator plate above. It is attached to the uterosacral ligaments (USL) and the fascia surrounding the cervix. The perineal body lies between the distal third of the posterior vaginal wall and the anus below the pelvic floor. It is 3-4 cm long. According to DeLancey (1999),.
