Fertile eggs yolks

[Puckers]

So my birds laid these eggs which showed clear when candling them. When I looked at the yolk they look fertile to me when i compared to imaged showing fertile and infertile yolks on the net? Is it wishful thinking or does anyone agree?

 

[Ol Grey Mare]

These eggss are showing a normal bladtodisc, not the telltale markings of having been fertilized.
When you say they showed clear at candling, how many days of incubation had been applied prior to candling?

 

[Puckers]

I normally leave it till about 10 days after last laid.