And before the beginning of the concept of "planned parenting."

Tell me. You ever run into an 18-year-old (or younger) that you'd recommend raising a child? I haven't - not that the choice isn't made to do just that, but holy merde. I've never met anyone I'd set out to actually DO that, just because.

You end up parenting in your teens by accident - and while it wasn't uncommon, in my heart of hearts, I don't think it's optimal.

Your mileage may vary.