Nudity and porn aren't the same thing. Porn is media intended to provoke sexual gratification. If you prefer porn is what the majority would consider material intended for sexual gratification.
Babies aren't sexual and they also don't as far as I can tell have any legal right not to have their parents take or share pictures of them. We could do well not to invent imaginary legal rights.
Do you really want to be the arbiter of right and wrong in all these cases? A lot of people think naked baby pictures are fine. Who are you to tell them they're not? It seems to me you want to police the whole world to make what you think is indecent disappear. Guess who also has similar ideals? Hardcore islamists (not that I'm saying wanting to block search results and creating a totalitarian regime are the same thing, but the ideal is wrong in both cases, in my opinion).
Babies aren't sexual and they also don't as far as I can tell have any legal right not to have their parents take or share pictures of them. We could do well not to invent imaginary legal rights.