Source: http://www.kidspot.com.au/parenting/child/child-development/drop-the-guilt-research-proves-that-working-mums-arent-harming-their-childrens-development/news-story/e87dbd7d09351643f1b86e2707b83262 Calculator shows how much sleep you lose as a parent Puberty at eight? Yep, it happens