Ultrasound and MR examinations have shown that after vaginal delivery the pelvic floor is situated in a lower position than in nullipara. In addition, the pelvic floor of stress urine incontinent (SUI) women is in a lower position than of continent women. DeLancey et al (2003) showed that women with POP generated 43% less maximum force and had more atrophy of the pelvic floor muscles than women without prolapse. One of the main theories explaining the effectiveness of PFMT on SUI includes factors that may change through strength training: increased cross-sectional area of the muscle (muscle volume), neurogen adaptation, imposed viscoelastic properties ("stiffness") of the connective tissue and altered location of the PFM at a higher level in the pelvic cavity. Morphological changes in relation to PFMT have not been examined in RCTs, but have shown a cure rate of 44-70% measured as < 2 gram leakage in various pad tests and significant increase in muscle strength after PFMT.