Addon:Descendant Count Gramplet
This is a Third-party Addon.
Please use carefully on data that is backed up, and help make it better by reporting any comments or problems to the author, or issues to the bug tracker
The Descendant Count Gramplet shows the number of descendants for each person in your database. The minimum number is 1 for each person, as each person counts as their own.
You can download this plugin by following the directions at Third-party Plugins.