dead keets at end of incubation, help, first time incubating!

[wildsequoia]

So I just hatched my first set of eggs. I am very pleased with the outcome considering all circumstances. However, my question is, at the end when it is all said and done I dissected my last three eggs that did not hatch and all three had fully formed keets that had died what looks to be right at hatch time. Is this commen or normal? What could be some reasons for it? I am thinking the temperature changes going on between hatches and me removing keets may have shocked them? The humidity was very high 70ish%. I am very sad i lost what appears to be healthy keets

 

[PeepsCA]

It's common to have some "quitters" that don't hatch, they can be caused by a number of reasons... such as the health of the adult birds the eggs were collected from, how the eggs were handled and stored prior to setting, congenital defects/birth defects that may have occurred while they were developing, maybe they got tangled up inside the egg when they started to get into the position they needed to be in to pip and zip and then struggled too long ending up too weak to hatch, it could have been incubator fluctuations, the humidity being too high may have not allowed there to be enough evaporation/moisture loss in those eggs and the keets had drowned, etc etc... the list can be quite long. Sometimes even if everything is in check a few will still quit.