I love my children, but boy, do they keep me up at night. I reckon over the last three years, 98% of my nights have involved being woken up multiple times, often for stretches of 30 minutes plus. The other 2% of the time I am away at conferences. Things were just settling down with our last one (by settle down, I mean just up once a night) when we had the next one. I think my partner has it even worse at the moment with our four month old!