Not well at all. Well, not well for North America. Different cultures are probably different, just as there are certainly generational differences. I know in small towns it's pretty much the norm, but in the city? No, in the city most people in their 20's are setting up their lives, and investing in their, and their potential future children's lives (or just partying). But, and this may sound like a dick move, those who decide to pump out 4 kids right out of highschool...well, you have to wonder what the fuck they are thinking. You don't have a career, you haven't really experienced all that much, and that guy/girl you're with is probably someone you don't really know. A lot can go wrong there.
Don't get me wrong, I do get that for some people, raising a family is the only real worthwhile goal and basically the purpose of their life. There's nothing wrong with that, but you kind of have to set it up these days. It's like if you want to be a doctor; you don't just go and drop resumes off at hospitals or open up your own clinic...there's a process you go through.
Now, that's not to say that everyone that takes this route is an idiot....I'm just saying I've noticed a correlation. Insert Boys in The Hood quote here.