How often does your faction produce heirs?

[Jacque Schtrapp]

I went through a dry spell that lasted at least 20 turns. Then my faction leader died and when his heir took over the family began producing babies like rabbits.

Sorry I can't answer that Bob, I haven't unlocked any factions by destroying them. I am close to wiping out the Greek Cities though, if I do manage to annihilate them I'll start a new campaign anf play a few turns to see if their family tree functions the same way as the Romans.