Red spot on the eggs

[DNA]

There are so many red spot on my viled's eggs.
Is it bad sign? Why red spot happen to the eggs?
Thanks in advance.

 

[BocaJan]

Are the eggs supposed to be fertile? They look like they are unfertile and will probably mold soon.

 

[Orin]

The red spots on those eggs means they're dead. Throw them away and keep the white ones. Those may simply have been infertile but the eggs that don't change color may still be okay. Closer to hatching you can see faint red veins but that can't be seen in a photo (only visible with backlighting).

 

[DNA]

Thank you very much above friends
The eggs have passed 5 months. If it is infertile, it will dead within one month.
Whether the dead reason is my error in incubation? I have made a temperature range between day and night.
Thank