I know people for whom their period stayed away for 1-1.5 years just because of breastfeeding. It doesn't always work that way, but it's not that rare either, at least it isn't rare to get to at least the 1 year mark.

On the flipside, breastfeeding is certainly a commitment. And one that will deprive your sleep. I haven't slept more than 2-3 hours consecutively since before he was born ;) Even when I've given PreZ a bottle with expressed breastmilk and go take a nap, I find I can't really sleep longer than that at the moment anyway.