6-9 days: Newly hatched lice reach sexual maturity in 10 days & can begin laying eggs.These eggs will hatch in 6-9 days & start the cycle over again.
Answered 2/28/2017
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Lice: These nits, or lice eggs, hatch in about 7 to 12 days. Baby lice or nymphs are about the size of a pinhead when they hatch, and quickly mature into adult lice in about a 9 to 12 days.
Answered 4/15/2019
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