METHODS: A total of 25 women affected by clinical stress urinary incontinence (SUI) were enrolled. After undergoing urodynamic assessment, pelvic organ prolapse quantification, urine culture, Q-tip test, and stress test, each subject underwent color Doppler ultrasonography to record clitoral blood flow and EMG of the urethral sphincter with a needle electrode inserted through the mucosa into the muscle tissue before surgery.