Population control…

I’m about to have a boom of nymphs in my colony and I would like to… not. Im separating my roaches by gender would like to keep my numbers where they are, but I know the females are already pregnant so I guess im wondering

Are there any humane ways to control the population? My tarantula doesn’t eat enough to keep the population down, and theres not many people in my area looking for hissing cockroaches.

Any opinions?