=Treatment.=--The treatment of ovarian prolapse depends upon the cause of the condition. Prolapse of the ovary caused by uterine displacement is usually cured by the treatment that restores the uterus to its normal position. Prolapse of the ovary accompanying tubal disease and prolapse caused by small ovarian tumors demand operation and removal of the tube and ovary. When the ovary is not adherent, it may sometimes be restored to its normal position, or at least be considerably elevated, so that the suffering is much relieved, by placing the woman in the knee-chest position and opening the vagina. In this position all the pelvic structures are carried upward. A pledget of cotton or wool placed back of the cervix, in the posterior vaginal fornix, will often give great temporary relief. The cotton may stay in the vagina for twenty-four to forty-eight hours. The woman should be advised to assume the knee-chest position, allowing air to enter the vagina by introducing the nozzle-piece of the vaginal syringe, once or twice daily. The best time is immediately before retiring at night, and she should afterwards sleep as much as possible on the side, in the Sims position. She should remain in the knee-chest position for several minutes--until tired. In addition to this treatment, the pelvic congestion should be relieved by continuous use of saline laxatives, by hot-water vaginal douches, and by occasional applications of Churchill’s tincture of iodine to the vaginal vault, and the use of the glycerine tampon. If the prolapse has been caused by subinvolution of the ovary and its attachments, such treatment may ultimately result in cure. The enlarged ovary diminishes in size and weight, and its ligaments contract and regain tonicity. Subinvolution of the uterus is often also present. This condition should be treated as has already been advised. In many cases of ovarian prolapse there have taken place in the ovary secondary changes that resist such treatment even when most conscientiously applied. The physician is then driven to the operation of oöphorectomy as the only method of relieving the intolerable suffering. This operation should never be performed, however, until other milder treatment has been carefully tried, and unless the suffering of the woman incapacitates her for the duties of life. In some cases in which the ovary is not itself grossly diseased it may be possible to avoid oöphorectomy, and to correct the displacement by attaching the ovary by suture to the upper margin of the broad ligament, or by shortening the infundibulo-pelvic ligament by suture. If the ovary has become adherent in Douglas’s pouch, the condition can be relieved only by operation--celiotomy, and usually oöphorectomy.