dave2008
Legend
They definitely could be, but people have made 3pp products that are relevant to the discussion and WotC continues to expand the list of domains,If you're discussing 5e domains instead of Pathfinder (I'm guessing this popped up here because this used to be a 3.e forum), a thing to remember is that domains in official 5e are much broader in scope than those of earlier editions. Stuff like Birth and Fertility would be covered by the Life or Nature domain.