We do have life transitions, most suggest every 7 to 10 years in our adulthood... and any one of these can end up being a crisis, if we avoid the reflective and internal work associated with transitions...

The label of Mid Life Crisis originates from the transitions that occur in the 40s or 50s. Perhaps it stands to reason that this is a more imperative time in our lives when we really begin to deal with our mortality, as well as hormonal changes, and if we've avoided the work in previous transitions, they stick with us until we do the work, so it's compounded...

So it is becoming more accepted I would suspect, that we call any transition that is being avoided as MLC...