I only know that my bmi was in the normal range at my booking appointment, but have only myself once since!! Too scared to keep weighing as I know already I'm going to be putting on weight! I think a stone and half to 2 and a half stone is normal weight gain, all depends on your starting weight really. A friend of mine put on 4 stone during her pregnancy, and that was only within the 3rd trimester as she didnt find out she was pregnant until halfway through, and had been going on diets and loosing weight before that eeekkkk!!
xx