●        Objective Pelvic floor disorders are frequent in women over the age of 50 years. Assessment of risk factors predisposing to pelvic floor disorders is essential to offer guideline-compliant therapy and to improve patients’ quality of life. This study aimed to identify anatomical risk factors for developing pelvic floor disorders. Specifically, we analysed which aspects of the shape of the bony pelvis were associated with the occurrence of pelvic floor prolapse (POP). ●        Design In this cross-sectional study, we compared the shape of the pelvic floor and bony pelvis between three groups: (1) nulliparous women, (2) parous women with no pelvic organ prolapse (POP) and (3) parous women with POP. ●        Setting USA ●        Population or Sample Nulliparous and parous women with and without POP. The primary sample comprised women around 50 y.a. (mean = 50.3, SD = 1.3), with seven women in each group. Methods Landmarks on the pelvis and the urogenital hiatus were collected on MRIs. Using Geometric morphometrics and principal component analysis, new principal axes of variation were established. ●        Main Outcome Measures Individual scores along the first and second principal components. ●        Results The three groups are different when the soft tissue’s shape is analysed together with the shape of the pelvis. Once pelvis landmarks are considered separately, the difference exists only between parous women with and without POP. The difference is highly significant and generalises to other age groups. ●        Conclusions                 The shape of the pelvis in adult women can be used as a risk factor for post-partum POP development.