this is really worrying me that my 2 yr old daughter is only babbling while her twin brother talks well in 3 word sentences. she seems to hear well, we even done a BERA test which showed no problem.she'll repeat one or two words, if we tell those words to her and babbles a lot. she doesn't point and seems less demanding.but she cries for some things that she wishes to possess. she has achieved all other milestones even though very late compared to her twin brother. she recognises a few things by turning her head towards them when we ask for it. eg,for 'where's light?' she turns towards light. she plays with her brother at times, even if he invites her all the time for playing. is the IQ less or is it simply speech delay. please give me some information.