DS1 is 3 and has developmental delay and delayed speech. He can say a lot of words but his pronunciation is very poor. We've been testing which sounds he can/can't say and have realised that he can't stick his tongue out. Having looked at his tongue I think he has tongue tie and this may be responsible for some of his speech problems. Normally it gets picked up in babies so I don't know if it's unusual to be potentially undiagnosed at 3. I also don't know who is the best health professional to approach? Any ideas or experiences would be appreciated.