 I did a blog post called Basement Fertility where I just set a map of Europe and whether you're living with your parents and what fertility is and not a perfect correlation, but yeah, it's what you'd expect. Down in Southern Europe, when they keep living with their moms until they're 40, they have hardly any kids. And you move up north where they're moving out and having independent lives and they don't have fertility of three or even two, but it's a lot higher than down in Spain or Greece or Italy where you just basically have your mom do your laundry your whole life.