50 women between the age 25-50 with a history of one vaginal delivery will be recruited for the study. 25 women who complain about stress urinary incontinence (research group) and 25 healthy women (control group). all research participants will sign first a participant consent form. all participants will be interviewed about their own delivery, measured for weight and height and follow a trans abdominal ultra sound (TAUS) examination. the research group participants will be asked to fill a quality of life questionaire concerning their SUI complaint.