Are these eggs fertilized?

[mybackyardhobbyfarm]

I recently bought some eggs from the store. Obviously I know better than store-bought eggs for hatching or incubating, but

I am just curious if they are fertilized? I know it’s not likely but they have this white dot on them.

 

[MillersFarm]

I don't see any signs of a fertile egg here.

 

[chuckachucka]

No I think they are just large blastodiscs (infertile). If fertile there would be a clear ring around the white circle

 

[lazy gardener]

They look to be quite old. Also, the carton would be clearly marked as "fertile eggs" if there was even a remote possibility that they COULD be fertile. Looks like the blastodisc has degraded.

 

[Coturnix Quail]

Funny (not funny) story. Once my sister bought organic eggs for baking, and when she cracked them, there was blood, an even some partially chicks inside them! Gross