dd had a normal birth.She was a big tall baby.She had reflux for the first 7 months and has been prone to ear infections.Apart from her immobility she is a normal happy smily girl with about 8 recognisable words.She did not get her sitting balance until 9 months.She attempts to get somewhere if put on her tummy,and manages to stick her bottom in the air,but flails her legs about uselessly.If in a sitting position she can bend forwards until her nose touches the floor and can bend from side to side to grasp objects.She attempts to pull herself up from lying on back into a sitting position.She does not roll much from side to side but enjoys playing with her toes when laid on her back.If stood against a table/side of the bath she will take her own weight.Should I be worried,or is it more likely she is a bit of a laid back late developer and will just take off one day???