Fertile versus infertile?

[Sonia]

I know there was a thread with pictures showing the difference between a fertile and infertile egg but I can't find it? Would someone please point me in the right direction?

 

[Tuffoldhen]

https://www.backyardchickens.com/forum/viewtopic.php?id=16008

Here you go......

 

[Sonia]

Thank you ever so much!