i got told that all females crickets have eggs in them from only a couple of days old and they only lay them when they fully grown and if you got anything like sand dirt andits becomes moist then she will lay her eggs and only takes 3 or 4 days before they hatch and they can lay up to 800 eggs but once they have hatched they intend to get eaten but other/older crickets.

so if your thinking of breeding them get a chinese container or something make a alaminium lid for it as the crickets would eat through fibrglass one's

only fill the container up half way with some type of substrate and that keep alot of moisture then remove it and put it into another container 15 gallon. but make sure you put some masking tape of some sort half way around the cantainer to stop them from crawling out then yeah