The aim of this study was to develop the short form of a condition-specific, reliable, validated and self-administered instrument to evaluate sexual function in women with pelvic organ prolapse and/or urinary incontinence. The Pelvic Organ Prolapse/Urinary Incontinence Sexual Questionnaire -12 (PISQ-12) was developed from the data of 99 of 182 women surveyed to create the long form (PISQ-31). An additional 46 patients were recruited for further validation. All subsets regression analysis identified 12 items likely to predict PISQ-31 scores. Short form scores underwent correlation analysis with long form, Incontinence Impact Questionnaire - 7 (IIQ-7), Sexual History Form -12 (SHF-12) and Symptom Questionnaire (SQ) scores. Test-retest reliability was checked with a subset of 20 patients. All subsets regression analysis with R>0.92 identified 12 items that predicted PISQ-31 scores. Short form scores were highly correlated with long form scores ( R=0.75-0.95). Correlations of the PISQ-12 with SHF-12 ( R=-0.66 and -0.68) and IIQ-7 ( R=-0.38 and -0.54) scores were similar to correlation of the PISQ-31 with these other measures. Reliability was moderate to high, with weighted kappa values from 0.56 to 0.93. PISQ-12 scores were lower in patients with low sexual function as measured on the SHF-12 ( P <0.001), and lower in women with depression as measured on the SQ ( P <0.001). The PISQ-12 is a validated and reliable short form that evaluates sexual function in women with urinary incontinence and/or pelvic organ prolapse and predicts PISQ-31 scores. It is able to distinguish women with poor sexual function as measured on the SHF-12.