There is no doubt that when we were young lack of sleep wasn’t considered a problem.  Sometimes we wore it as a badge of honor.  You could cram for exams and believe that was the best way to study!  Partying hard back then was as it should be.  The next day was painful, but it was worth it. Then you were responsible for a newborn.  You were not in control of when you got to sleep. Mix that with the hormonal changes going on postpartum and you started experiencing the effects