Cockroaches produce eggs in masses called an oothecae. These egg cases contain up to 60 eggs, depending on the species. The female glues these in a sheltered area near a food source. Some species drop oothecae immediately while other species, such as the German cockroach, carry them until 24-48 hours before they hatch. Depending on the species, the female can lay up to 90 of these egg cases in her lifetime. When cockroaches hatch they are white but quickly turn into their coloration within a couple of hours. The metamorphosis of a cockroach is egg, nymph, and then adult. Complete metamorphosis lasts between 53 days to 2 years depending on species. You can find all stages together, but sometimes they are segregated by size based on their hiding place.