Inclusion Criteria:  postpartum women aged 20 years or over with a diagnosis of stress urinary incontinence three months postpartum signed an informed consent form a urine leakage when coughing with bladder volume 200 to 250 ml able to perform a pad test 1-hour  Exclusion Criteria:  uncontrolled diabetes mellitus grade 3 and 4 pelvic organ prolapse mixed incontinence in the patient chronic degenerative disease/trauma that affected muscle and nerve function previous history of pelvic surgery pacemaker