The eggs are white, and hatch into nymphs in 1-2 weeks. They require a further 12 days to develop into adults. The complete cycle from oviposition to complete development of the adult louse requires around 28 days. | The eggs are white, and hatch into nymphs in 1-2 weeks. They require a further 12 days to develop into adults. The complete cycle from oviposition to complete development of the adult louse requires around 28 days. |