"Our 11 year old son is a minimally verbal boy on the autism spectrum. He can say a few words including ‘papa’ and ‘mama.’ But in the last year, he suddenly started only whispering or mouthing these words. I can see his lips move. But very seldom can we get him to speak loud enough for people to hear. Otherwise, he seems to be developing quite well. Why is this happening? Can anybody help?"
