The term can be used to describe misalignment of the valves of the heart (mitral valve prolapse), protrusion of the rectum (rectal prolapse), or even spinal disc herniation (lumbar disk prolapse). Prolapse is a common condition in medicine which occurs when the structures designed to keep organs in place weaken or stretch, causing them to literally “fall out of place”. The term can be used to describe misalignment of the valves of the heart (mitral valve prolapse), protrusion of the rectum (rectal prolapse), or even spinal disc herniation (lumbar disk prolapse). Pelvic organ prolapse is a medical condition that arises when the normal support of the vagina is lost, resulting in the descent of one or more pelvic structures (bladder, urethra, cervix or vagina).