Objective: To determine whether oophorectomy during the perimenopause, with the associated decline in ovarian androgens, affects Sexual function and psychological well-being negatively. Design: Prospective, observational study comparing sexuality and psychological well-being in women after hysterectomy only (HYST) vs. hysterectomy and concomitant oophorectomy (HYST+BSO). Setting: University hospital and district general hospital. Patient(s): Three hundred sixty-two perimenopausal women scheduled for elective hysterectomy on benign indication were recruited and 323 (89%) completed the 1-year follow-up (217 in the HYST group and 106 in the HYST+BSO group). Intervention(S): The patients were evaluated preoperatively and 1 year after surgery. Postoperatively, estrogen replacement therapy was recommended to all women in the HYST+BSO group and to HYST group subjects with climacteric symptoms. Main Outcome Measure(s): Sex steroids (T, androstenedione, DHEA-S, and E,) and sex hormone-binding globulin (SHBG) were measured. Free androgen index and free E, index were calculated. Sexuality (McCoy's Female Sex Questionnaire) and psychological well-being (Psychological General Well-Being Index) were evaluated. Results(s): Preoperatively, no hormonal differences were found between the two groups. At 1-year follow-up, all sex steroid levels and indices were decreased and SHBG was increased in the HYST+BSO group. Ovarian sex steroids were decreased in the HYST group, whereas DHEA-S and SHBG were unaltered. Sexuality was unaltered in the HYST+BSO group, whereas decreased scores were found in 3 of 14 sexual variables in the HYST group. Psychological well-being was improved in both groups. There were no correlations between the observed changes (data I year after surgery, compared with preoperative data) in androgen levels and index and the observed changes in any aspect of sexuality or psychological well-being. Conclusion(s): Hormonal changes after oophorectomy in conjunction with perimenopausal hysterectomy do not significantly change postoperative (1-year) sexual or psychological well-being. (c) 2005 by American Society for Reproductive Medicine.