Abstract: This prospective study compares the prevalence of stress urinary incontinence during the first year after delivery in spontaneous vaginal deliveries and elective caesarian or caesarian after failure of normal delivery. In the present study, 330 primigravid women were followed for one year after delivery. Those suffering from incontinence before delivery were eliminated from the study, therefore only those presenting incontinence after delivery were studied. The patients were categorized under three groups according to the method of delivery: normal vaginal delivery (120 cases), elective caesarian (110 cases) and caesarian following obstructed labor (100). The frequency and intensity of stress urinary incontinence as well as demographic and obstetric parameters were studied in the three groups. The three groups were different in terms of age and weight. The prevalence of stress urinary incontinence after spontaneous vaginal delivery (3.9%) is similar to caesarian following obstructed labor (5.12%). However, the stress urinary incontinence was significantly less frequent following elective caesarian (3.6%, p<0.05). The prevalence of stress urinary incontinence is similar after spontaneous vaginal delivery and caesarian following obstructed labor. On the other hand, elective caesarian without undergoing labor is significantly associated with a lower frequency of stress urinary incontinence. Whether or not elective caesarian is necessary to prevent pelvic floor injury needs to be elucidated. The two factors of age and weight have been used as confounding factor.