If your life changes significantly, it is wise to take a look at your estate plan. There are simple ways to determine what is significant, according to the Dover Post in "Change plan as plans change."
A significant change in life circumstances includes things like getting married, having children, changing jobs, a death in the family or a divorce. However, that is not a comprehensive list, because a comprehensive list of every significant thing that could happen is not possible to make.
All those things have something in common. They ordinarily cause people to make significant changes to their life. If you get married, the path you plan for your life will change.
If you keep that in mind, you do not need to worry about a list of significant changes in life circumstances.
An estate planning attorney can advise you on taking a fresh look at your estate plan, when those inevitable changes occur.
Reference: Dover Post (April 17, 2018) "Change plan as plans change."