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Published 13:01 7 Apr 2016 BST
Updated 13:47 7 Jun 2016 BST

The publication also cited other studies which produced similar results. One found that working fathers had less sleep because mums had the opportunity to “catch-up” during the day.
The evidence is, of course, circumstantial and the objectivity of the subjects has to be taken into account – the book noted that some of the findings were based on how dads and mums “felt.”
If your little one is keeping you up, we'd recommend checking out these top tips from Irish mums.