How long do Jew eggs normally incubate and how can I know if it is ready to hatch?

You do realize that Jews have children the same way gentiles do, right? There is no such thing as a "Jew egg" - technically, we are all born from an egg + sperm, but somehow I don't think that's what you meant. Let's clear it up: A Jewish man and a Jewish woman conceive a child the normal way. The Jewish woman has a normal pregnancy for nine normal months and gives birth normally to a normal Jewish baby.