My son is almost 20 months and he says mom dot and what. (knowing the meaning) never together either. Then says dada and other words but without a meaning. We are not concerned though because one boys take longer to talk then girl (at least what I have been told) and because he is up to 3 years advanced in his motor skills. So I guess talking is on the back burner for him. IF ANYONE has ways that I can help him talk though I am listening!!