urogenital hiatus urogenital hiatus in anatomy, the urogenital hiatus is the structure through which the urethra and the vagina pass. it is located in the anterior (front) of the pelvic floor. the pelvic floor has two hiatuses (gaps). the other is the more posterior 'rectal hiatus', through which the anal canal pass. function the urogenital hiatus allows the vagina and urethra to pass through the pelvic floor muscles. clinical significance the urogenital hiatus has been linked to urinary stress incontinence.