I'm worried about my DS in terms of the things he is able to do. He is 4 months old exactly and still can't roll from either front to back or back to front. He has literally just started to grasp a toy if you put it right in front on him and 9 times out of 10 he misses before grasping it. He never 'reaches' for toys at all. He is nowhere near sitting up and is still very jerky in his movements.
Is this normal? He seems so far behind some other babies his age, ones that I know are reaching for things and pushing themselves up at tummy time - he just face plants! He smiled a bit late as well.
Other than this he is happy and healthy, he was 'full term' but two weeks early but that shouldn't make a difference should it?
I am doing what I can to encourage him but I can't really force his development. I'm just worried this isn't normal?