I'm worried about his development. He was 9 months on the 17th april and is a happy boy- sat up independently at about the right time, vocalises well, eats and sleeps well most of the time including feeding himself and has recently learnt to wave.
He was slow to smile and it was almost 6 months before his eyes weren't crossed any more. My main concern is his gross motor; he can't crawl but he recently learnt to do that dragging across the floor on his belly pulling with his hands. Weirdly he pushes with one leg to help but the other he drags. He rolls one way but isn't keen the other way and isn't that bothered about rolling. He can get up on all 4s and Rock but is quickly frustrated and can't get to crawling from here. He can't pull to standing although he does bear weight. My first child was crawling and had pulled up long before this age and I can't help worrying that he isn't just late side of normal but something isn't right- especially the leg dragging with the creeping