A mature female dubia roach will produce an ootheca or about 20-35 eggs. This is soon retained and incubated in a special brood pouch. About a month later, the eggs hatch, and the female appears to give birth to small (5mm) white nymphs. Nymphs are the juvenile stages of insects which exhibit incomplete metamorphosis, which includes all other roaches, true bugs, grasshopper and crickets. The rigid chitinous shell of nymphs cannot grow or expand very much. Therefore, the nymphs have to periodically shed their skin. I’m not sure how many moults the nymphs go through before adulthood, probably about 7. A nymph will roughly double in weight after each moult. A newly moulted roach will be white in colour, and very soft. Adulthood is achieved in 4 to 5 months, which become sexually mature after a couple of weeks. Males spend much of their time displaying to females. Adult males will live for approximately 9 months, the females live could probably reach 18 months. The females have a clutch of young every 2 months, probably less often as they get older.
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