Dad of twin girls, 1 year old yesterday. Non-identical, in fact about as different as you can get. Like chalk and cheese physically and personality wise. The 1 way in which they are the same is that they don't have a tooth between them. I find this a bit weird and my wife's a bit worried. Does anyone else have experience of late developing teeth? Given how different they are, I'd have expected a tooth from 1 of them by now.