What is this thing in the egg?

[Emanderas21]

hello!

Certainly I assumed our eggs couldn’t be fertile as we culled our only rooster maybe 8 weeks ago, however this egg looks like the target I was told fertile eggs would have and we had what I swear looks like a tiny chicken fetus in one of them.

Pictures attached below. Can anyone with chicken knowledge tell me what this is?

Thanks!

 

[Ol Grey Mare]

The spot on that yolk is an unfertilized germinal disc, there is one on all yolks and it is where development takes place IF fertilized and incubated....in a fertilized egg the spot has a distinct bullseye mark not showing here.
The tissue is just that, tissue

 

[Keeperofmunchkins]

The egg looks fertilised to me... I know eggs can be fertilised weeks after a rooster is removed, but 8 weeks seems a bit too long.

The little blob in the first pic looks like just a big 'meat spot', tissue from the hens reproductive system inside the egg. A chicken embryo does look something like that at a few days old, but there would also be blood veins and the yolk would have broken apart if the egg had been alive. Also a broody chicken would have had to sit on it for days which you probably would have noticed.