My son was born premature, he weighed in at just 1lb, after operation on his upper bowel and they had to try out a new drug to develop more white blood cells,after 4 Months he started to develop quite normally, he is now a 21 year old 19 stone Man City menace, premature babies take quite a while to develop in certain areas, but eventually come through this and in some cases start overtake, hope everything goes well for David and his family, I cannot thank st marys hospital for the amount of care dedication and duty