How long is the gestation period for crawdads (crawfish) ?

Question

I have a pair of crawfish in my tank and I just noticed yesterday that the female has laid some eggs (attached under her tail). I'm just wondering how long it takes for them to hatch.

Answer 1

In 10 – 20 days after fertilization, the female will release her tiny eggs and gather them up in the swimmerets under her tail where they will remain until they hatch in about a month.
During this incubation period the female may remain in hiding and not even come out to eat. A female carrying eggs, that moves around, will usually keep her tail curled around the eggs as she moves.
Once the eggs have hatched, in about a month or so, the female will continue to carry them for a couple of days before releasing them.
FROM http://www.practical-pet-care.com/crustacean_question.php?ID=2.2005040118452709
A

Answer 2

Crayfish Pregnancy