Hi I'm new and have a quick question

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My son is 19 1/2 months old and is very healthy and happy he seems to

be right on track or a head in most things except talking. he can say

DaDa (for daddy), KiKi (for kitty), no which comes out more like Naa

and More that sounds like maure i asked his doctor and he says that

it because he is a boy and an only child but i don't think thats it.

he understands everything we say, he follows directions but when he

wants or needs something he just wines and has a fit because we have

no idea what he wants. he bangs his head on the floor when he get

frusterated and then he hits us and bits us and we have never hit

him! i am not sure what to think at this point i know that he can

hear and i know he understands, but at his age he should be saying

more that just four or five words (he says mama but its like Maa

Maa Maure)= ma ma more any suggestions on what to do?