I'm so sorry that you lost the clutch.

The one good thing I see in all of this is that it would be majorly unusual for anything genetic to have caused each and every one of these babies to die. It seems to me that something other than inherited problems would be at fault.

If you can check everything and make sure that something isn't wrong in the incubation environment, I'd guess that next year you might end up with a bunch of healthy babies.