This pertains to the FW ghost shrimp we catch in planted ditches, ponds, and lakes in the southern US:
Females grow larger than the males. They carry their greenish-grey eggs attached to their swimmerets (just like crayfish). The eggs look as if they’re inside their bellies because their legs look like part of their abdomens. If you want babies, you’ll want to isolate egg-bearing females in their own maternity tank. The babies cling to the swimmerets once they hatch out for approximately 10 days. Place pleated plastic or fiberglass screen in the tank to allow the newly walking larvae to spread out. The more they can spread out, the less cannibalism will occur among the larvae. They'll feed on nearly any food you feed the adults.