Utero-vaginal prolapse occurs when the uterus and vagina descend from their normal positions due to weakness of the pelvic floor muscles and supporting tissues. The document defines the normal positions of the uterus and different degrees of uterine descent. It describes examinations used to evaluate pelvic organ prolapse and discusses various surgical procedures to correct prolapse of the uterus, vagina, and vaginal vault after hysterectomy. Conservative measures including pessaries and pelvic floor exercises are also outlined.