Both my twin boys are growing at the same rate, but a difference in size below 20%. Even though they are both fine and have a clear bladder one sack is smaller than the other one. Yesterday the donor baby increased the fluid to 11 cm which falls into the stage 1, but the recipient baby is above 2cm. So technically not stage I. I am confused and worried on what will happen. Can babies have this difference is fluid but still go without any problems? Or will I eventually need surgery. Is confusing not falling into any category and not understanding what is going on.