Forgot to say after having a baby your uterus never returns to its pre-pregnant size. Your uterus has probably srunk to almost a small as its going to get however the abdomen skin and muscles take much longer to srink back down and unfortunately unless your extremely lucky never go back to being a tight as they were pre-pregnancy. My stomach after bothe kids went back to being flat at some stage although I could stretch my skin out and if bending down will sage a bit. With DD1 took 2years to go flat and thin again but I put on 40kilos so it wasn't till I lost most of the extra weight that my stomach looked good again. (2yrs it ook) It can take a long time. Some exercise can help with the skin and muscles but not much you can do for your uterus and it should by now be pretty small again especially if this is your first baby.