It is now admitted by those surgeons in London who have had much experience of hysterectomy for fibroids, that the immediate results of preserving at least one healthy ovary in this operation are admirable, especially in women under forty years of age, for the retention of an ovary is of striking value ‘in warding off the severity of an artificial menopause’ (Crewdson Thomas). Although I have left one or both ovaries in the performance of abdominal hysterectomy for fibroids in more than 300 patients, in only two instances have I found anything detrimental in the practice. In these two patients it was necessary to remove one of the ovaries. Since 1906 I have modified the method by leaving only one ovary, even when both were healthy, and find that the immediate good consequences of the operation are in no way impaired. There is reason to believe that whatever good effects follow the practice of leaving a belated ovary (that is, an ovary divorced from the uterus and left in the pelvis), they are temporary, for in the course of a few years the ovarian tissue disappears and the patients experience the usual symptoms of the menopause. It is possible that the rate of atrophy of the secreting tissue of a belated ovary depends on the age at which a patient is submitted to hysterectomy. In 1898 I performed subtotal hysterectomy on a woman, thirty-one years of age, for fibroids, conserving the right ovary. Nine years later (1907) I operated again for intestinal obstruction, and found this ovary healthy and functional, for a ripe corpus luteum was visible on its surface. Even a portion of an ovary, if it contain follicles, will maintain menstruation. In performing abdominal hysterectomy for fibroids, there are three points which require consideration in relation to the subsequent comfort of the patient, and they depend mainly on the conservation of a healthy ovary. These three points relate to: (_a_) the patient’s comfort in securing freedom from flushings; (_b_) if she be married, her marital relations; and (_c_) if single, her nubility. In regard to marital relations in women with a belated ovary, nothing trustworthy is forthcoming, but I believe the retention of an ovary is an additional factor in promoting domestic bliss. The question of nubility is interesting; I am able to state that women who have had subtotal hysterectomy performed, with conservation of one ovary, have married and lived happily with their husbands; and I am of opinion that the preservation of the vaginal segment of the neck of the uterus is an important factor, as it leaves the vagina intact, and though such women are sterile, they are certainly nubile. Without overstating the case it may be said that a belated ovary is a very precious possession to a woman under forty years of age, whether she be married or single. In regard to the fate of such ovaries, in the present condition of our knowledge it may be stated that:--