Methods: Fifty Caucasian women 50 to 77 years old (mean age 66.6 years), 2 pre and 48 post menopausal with stage II-IV pelvic organ prolapse, enrolled into the study. Vaginal reconstructive surgery included an anterior colporrhaphy in all patients, posterior colpoperineorrhaphy in 28 patients and hysterectomy in 36 patients. They were randomly divided in a control group of 22 women and a study group of 28 women. As reinforcement to the anterior colporrhaphy procedure a polypropylene tape (TVT-O) was placed not under the midurethra, as originally described in case of stress incontinence, but underneath the bladder base and was fixed there with polyglactin sutures, in the study group. The postoperative follow up was carried out in frequent intervals of 4 months (total 48 months). The assessment of the anatomic result included evaluation of the operated sites and of the position of the tapes inserted on clinical grounds and after perineal sonography, which measured the distance of the bladder base to the inferior edge of the symphysis pubis.