Baby Greetings Messages I Have A Question About A 19 Month Old Baby?

I have a question about a 19 month old baby? - baby greetings messages

My friend is the nephew of 19 months and still can not speak words. He can say, like "da" "ma" and ah ". But you can not even communicate properly with each other. One can understand the greetings and departures to say goodbye to the people and brought with them. But the head is abnormally large. His father and mother have a wide head. However, the increase in births in the top of the dome, as if it was swelling. It is autism?