Where did you stash by superannuation, baby? - missing superannuation with caring for kids
Having a baby is a very expensive business, but the most expensive problem is not formula or nappies but something you may not notice for quite a few years. The superannuation that a parent who takes parental leave from their workplace misses out compounds over a lifetime to tens of thousands of dollars depending on your salary (try this calculator to see what the 'baby making' effect might be on your superannuation balance)