My DD is 20months, not crawling, walking or saying any words yet. Babbles and uses his voice to make noises. He can sit up, get on the floor and roll over himself but can't get back up to a sitting position himself. He can't crawl yet although is going backwards a little when he tries. The paediatrician has put this down to GDD and we are going for blood test next week to make sure it is nothing more serious. Any other mums out there with babies of the same age going through the same thing? It is a little isolating when all the other children his age can do everything he can't. Everyone keeps asking me why he doesn't crawl or speak.