Hey Yael, I don't know too much about it but one of the mums at my mum's group had the surgery and it has been perfect ever since. Hers was caused by the way she was pushing when she had her son, not sure on the exact details though. As for another birth causing it to happen again, I suppose it could depending on the way the birth went....

Sorry, not much help there was I?! *hugs* to you anyway & I hope it's all fixed up soon.