“Egg-topsy” on my bad eggs... what happened

[FendersMom]

Put our eggs into lockdown tonight in preparation for hatching. These are the 4 eggs that started developing, but stopped. We cracked them open for science and to see why they stopped growing. What do you think happened? I have been using a nurtureright 360 Bator with autoturning. I think they died around day 7-10 (the day 8 writing is just a guess). What do you think? I wonder what happened.

 

[Sapphire Sebright]

As far as I can tell, some eggs just aren't meant to make it, and they quit after some time.

 

[Punkybrewster]

Looks more like day 3-6.
You can look up online incubating chick death. It will give you some suggestions on what could cause deaths at different stages.

Wish i could remember the link....