Maybe comes from the fact that child mortality has reduced dramatically. But the habit in this countries of having more than 5 children hasn't changed yet? Pro

Maybe comes from the fact that child mortality has reduced dramatically. But the habit in this countries of having more than 5 children hasn't changed yet? Probably it takes a generation for families to adapt to the fact that you don't longe need to have several children to make sure that some of them survive to adulthood. Take a look at this TED presentation for some amazing facts. http://www.ted.com/talks/hans_rosling_shows_the_best_stats_you_ve_ever_seen.html http://www.ted.com/talks/hans_rosling_shows_the_best_stats_y...