The Urinary incontinence is the involuntary urine loss causing a social and hygienic problem. The problem of urinary incontinence is often associated with pelvic prolapse. In our study we aimed to reveal the anatomical features of organs or formations in women who have pelvic prolapse together with urinary incontinence, and to evaluate the relationship between illness and age. This study was carried out on female patients who complained of urinary incontinence due to enforcement of the Urogynechology Policlinic of Erciyes University Faculty of Medicine between June 2006 and September 2007. Diameters of the aperture pelvis inferior (diameter sagittalis, diameter transversa) and aperture pelvis superior (diameter anatomica, diameter diagonalis) were measured from MRI scans of 46 cases of women who had urinary incontinence and prolapse, and whose prolapse were staged according to POPQ (Pelvic Organ Prolapse Quantification) system. The lengths of the pelvic diameters of the cases were on average 10.93 ± 0.96 cm for diameter sagittalis, 10.03 ± 0.86 cm for aperture pelvis inferior- diameter transversa, 12.00 ± 0.88 cm for diameter anatomica length and 12.89 ± 0.96 cm for diameter diagonalis. There was a statistically significant relationship between diameter sagittal lengths and prolapse stages in our study (p<0.05). The conclusion is that this increase in the sagittal diameter can weaken the pelvic floor and pave the way for pelvic diseases.