Longevity and infertility - the silent killers.

[Vantek]

As long as there are 2 replacements, I tend to kill off every prince older than 30 or even like 26 :P Changing kings is something best done as rarely as possible!

I've never been sure about what happens when an old heir grabs the throne - I have never seen a load of mature heirs suddenly pop up, but do you at least instantly gain a lot of underage heirs that are his already existing sons? Or does noone in MTW breed until they are the king? :P