Petros P P, Von Konsky B
Lancet. 1999 Sep 18;354(9183):997-8. doi: 10.1016/s0140-6736(99)03069-x.
Dynamic perineal ultrasound studies show that midurethral anchoring of vagina prevents bladder neck descent, funnelling, and urine loss on effort. Appearances are consistent with continence control by a musculoelastic mechanism.