Can't imagine that! I grew up as the oldest of six, and that seemed like a lot. The year that I finished high school, my youngest brother started kindergarten - my poor mom was only halfway through!
I also think it doesn't help with the problem of over population, but then, the USA isn't facing that problem yet. What we need to do is help the less developed countries with the population booms going on. I.e. African countries where so many kids used to die at young ages that families have a dozen kids just to make sure enough live to adulthood, then reach the developed stage where kids aren't dying at such a rate but the births continue. There's no need here in the USA for families of that size.