if you mean uterine prolapse, where the uterus basically starts to fall, it's from the parts that attach the uterus to the abdominal wall stretching too much or breaking. muscles have nothing to do with it.
Uterine prolapse means your uterus has descended from its position in the pelvis farther down into your vagina. Normally, your uterus is held in place by the muscles and ligaments that make up your pelvic floor. Uterine prolapse occurs when pelvic floor muscles and ligaments stretch and weaken, providing inadequate support for the uterus. The uterus then descends into the vaginal canal.
this is from http://www.mayoclinic.com/health/uterine-prolapse/DS00700
So I guess it does have to do with your pelvic muscles.
at 12:43 AM on Dec. 10, 2008
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