My child is almost 14 months and does not point, wave, clap or say any meaningful words. He says dada, but does not use this specifically for his dad. He babbles, and makes a lot of oooh sounds, he doesn't say mama, yet sometimes says nana. He can hear fine and dances along to music, so I'm not worried about his hearing. His health visitor is coming to assess him soon, but doesn't seem too worried. I've read that where he is behind in his development can be a sign of autism. We speak to him, read to him and name everything, we have "conversations" with him too to encourage him to babble back at our questions. He doesn't go to nursery but has contact with other kids his age who are all way ahead of him. I know I shouldn't compare him to other kids, but it is hard not to. Any advice?