AbstractExtensive reports on postoperative urodynamic evaluation of female patients with GSI have been published in the current literature. However, urodynamic data from immediate postoperative evaluation has not yet been presented.Urodynamic study was made in 33 out of 41 patients from 9th–12th postoperative day. Our results indicated that preoperative and postoperative FUL in erect and supine position were 2.90±0.71; 3.72±0.98; P<0.005 and 2.13±0.68; 3.55±1.67; P<0.005 respectively. Preoperative PFR was 23.4±11.2 and postoperative PFR was 8.1±5.2; P<0.001. Preoperative RU was 69.9±83.3 and postoperative RU was 194±179; P<0.005.On the basis of the foregoing figures and our previous study, the following conclusions can be drawn; edematous swelling, possible hematoma formation and possible damage of the nerve supplying the bladder during dissection may be causes of postoperative voiding difficulty. The results of FUL obtained immediately following operation may serve as a parameter for predicting the outcome of corrective surgery. This may provide a simple way to judge whether or not the proximal urethra has been successfully restored to the intra‐abdominal pressure zone if the medical centers are not equipped with sophisticated instruments for measuring transmission ratios.