What I was trying to say is that while becoming a parent is an amazing rebirth, we don't have a way to grieve the person that dies in that process. We get so focused on the arrival of a child, that we never really have a chance to say goodbye to "single" version of ourselves, which I think is important as the switch to parenthood is dramatic and irreversible, and that younger version of ourselves is never coming back.
Not sure if I'm making my meaning clear... 2 am here and pretty sleep deprived!