Population Control

There are several measures put in place to keep the  population below twelve, although some can be altered.

Note there are few such restrictions for grendels, ettins or shee populations.

No. Of Norns	Effect	Source	Details
8+	No creatures can be imported	Hard wired	Even recently dead norns are counted, as long as they are still in the norn menu   Note that creatures can be injected using third party programd or cobs.
	Hatchery closes	Scripted	Eggs can still hatch in the wild
	Incubator shuts down		Can be by-passed by 24 Norn World cob Or by using Egg Unpauser
12+	Females can't become pregnant		This may be true but you can get multiple females pregnant when there are 11 or less norns. This can also be bypassed by the 24 Norn World cob
	Eggs in wild won't hatch		This can't be bypassed by using Egg Unpauser cob, but can be by No Eggs Birth instead, which makes them give birth to live young.