 1. At 6 months, urinary continence rates will be higher after a mid-urethral than after a Burch procedure. Urine continence will be assessed by composite measure of incontinence: no subjective complaint, no interim treatment, and negative standardized stress test performed by a masked observer. This assessment will be repeated at 12 and 24 months post-operatively to establish the medium term continence of the two procedures. Subjective continence and patient satisfaction measures will be obtained at each of the above visits using standardized questionnaires and pelvic organ support will be quantified by Pelvic Organ Prolapse-Quantification POP-Q scores. 