Dubia roaches are ovoviviparous. The eggs hatch out inside the female and they give birth to live larvae.

FROM WIKIPEDIA:
Lifecycle

Mating occurs when the male deposits a sperm packet in the female. This sperm packet inhibits the female from further mating.
Females then lay an egg sack, they then pull this sack back into themselves to incubate ovoviviparity.
Gestation is about one month (28 days).
The babies hatch inside the female. Between 20 and 40 live young, each about 2 mm long, are produced in each clutch.
Babies mature in about 4–6 months depending on temperature and food supply.
Adults live 1–2 years.
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