The aim of this study was to compare fixation and mobility of adjustable single-incision (Ajust) and standard transobturator midurethral sling (TVT-O) tapes based on postoperative ultrasound monitoring of the position of the tape at rest and at maximal Valsava (tape descent). The hypothesis was that fixation of SIMS Ajust is comparable to that achieved by the standard transobturator midurethral sling.