Pelvic floor descent syndrome (PFDS) affects multiparous and postmenopausal women. According to epidemiological studies in postmenopausal women, more than 50% suffer from severe symptoms of PFDS, which significantly reduce the quality of life. The high prevalence of pelvic floor pathology increases the need for multimodal diagnosis and treatment. The pelvic floor is a unique anatomical and functional structure and malfunction of this system may lead to many different static and functional disorders. There are a lot of methods of medical imaging modalities for PFDS (X-ray defecography, perineal ultrasound, MR defecography). MRI defecography allows to visualize in detail all three parts of the pelvis, including soft tissues and supporting structures; to evaluate structural and functional pelvic abnormalities in a single study. The range of normal mobility of the pelvic floor and pelvic organs on MRI defecography is still required.