Does anyone have any feel for when not talking starts to be a worry? ds is 19 months and while he mutters a fair amount of jargon from time to time he has yet to utter a single word with meaning ( not even the longed for "mummy" or "daddy" )otherwise he is happy and spends his day running round in a busy fashion. He also holds things up for us to name for him , but never seems to think he could say the name himself...also he seems to be able to hear fine and can follow simple commands like "take your sandals off" or "put that down!"