The 4 month sleep regression is a doozie for most new parents - it seems to come out of nowhere! Just when you think your baby's sleep is improving, and that you might be "out of the woods", sleep-wise, BOOM - sleep falls apart completely. It's easy to see, then, why the 4 month sleep regression is such an incredibly popular topic with our readers! We hear from numerous parents each month who want to know how they can prepare for the 4 month sleep regression, what to do during the regression,