my child has Microcephaly....he is 9 months old and everything is fine ecept he has the body of a 5 month old, he goos and ahhs, all the time.......we even got him to say Daddy at six months old...he knows ppl, he plays normaly, he cant sit up on his own or roll all over the place, cause his body is little.....what other thing should i look for in my child with this condtion

Summarized question: What causes microcephaly in an infant?