Gina Marciano, a 44-year-old mother of eight children, visited her physician complaining of a "bearing down" sensation in her pelvis, low backache, and urinary incontinence. A vaginal examination showed that the external os of her cervix was just inside the vaginal orifice and her perineum exhibited large keloids (masses of scar tissue). Her history revealed that she was a member of a commune located in the nearby mountains that shunned hospital births (if at all possible). What do you think Gina's problem is and what caused it? (Be anatomically specific.)