Pat, The only effect of breastfeeding on the urinary bladder that I can think of is that the uterus contracts during breastfeeding, this could conceivably affect the bladder as it lays right over the uterus. I cannot imagine how this could prevent healing of a prolaspsed bladder, unless it allows it presses it into the symphysis pubis. As far as I know, contractions actually increase blood flow to the pelvic area! Catherine Watson Genna, IBCLC Catherine Watson Genna, IBCLC