OBJECTIVE: To estimate sexual dysfunction before and after trocar-guided transvaginal mesh surgery for pelvic organ prolapse. METHODS: Sexually active women participating in a prospective multicenter study were recruited at 26 centers. All participants underwent a standardized surgical procedure and were evaluated before (n=105) and 1 year after (n=84) surgery using the short form of the Pelvic Organ Prolapse/Urinary Incontinence Sexual Questionnaire (PISQ-12). Nonparametric statistics were used for comparisons. RESULTS: Mean age at surgery was 61.5 years (standard deviation [SD] 7.6), median parity was 2 (range, 1-6), and mean body mass index was 26.8 (SD 4.3) (body mass index is calculated as weight (kg)/[height m]). Anterior transvaginal mesh repair was performed in 46 patients (44%), posterior in 26 patients (25%), and combined anterior and posterior in 33 patients (31%). Overall sexual function scores worsened from 15.5 (SD 8.0) at baseline to 11.7 (SD 6.9) 1 year after surgery (P