Are maternal antibodies present in the eggs?

[dcwatson84]

Are maternal antibodies present in the eggs, or only passed through contact with the hen? I'm hatching chicks at home, all products of my current flock, which have all been vaccinated at hatcheries. I know that chickens pass some degree of resistance to their chicks, but not sure how and and when.

FWIW - I'm planning to vaccinate all my chicks regardless, so I'm not trying to determine a position on that, just asking out of curiosity.