ODD BUT TRUE ??

The old timers used to say,  when hatching eggs under the hen or in the incubator, and there is a lighting and thunder storm,  it is likely that a good portion of the eggs won’t hatch.   Upon opening those eggs,  it was found that the little chick was well formed but dead.   I have googled this and found that many of today’s poultry farmers say exactly the same thing.