Rotational Play - Keeping the population in check!

I started my rotational save with one large family, but once the children grew up and formed the rotational households, I only let most of them have one pregnancy. Right now I am aiming for one household per world, so when there's a new pack with a new world, the non-heir twins get to found a new household. I haven't had triplets yet.

I only have aging on for the active household and keep my rotations lined up so everyone ages together, though I don't always play in the same order.