When a preschooler's family changes with the addition of a new baby, in the first several months it is common to see all kinds of regression and limit testing.  It doesn't always happen right at birth, but after the honeymoon phase when baby is crawling, mobile and getting into things more we will usually see an uptick.  This episode is for you if you are planning to have a second child, already had one, or are just seeing new behaviors in your big sibling now that baby is here.