How early into incubation can you tell if theyre fertile or not?

[Peristeria]

Hey yall! Today (since I have to patience ) I candled our quail eggs at day 5 but there seems to be no development... maybe a tad darker blob but none have veins? Is this a sign all of them are infertile? I cracked one open from 2-3 days ago (that wasnt in the incubator) and it appeared fertile (large white blob on yolk?? is that right?) but after searching the internet, I have no answer to my question. Thanks!

 

[FloorCandy]

All eggs will have a white spot, fertile eggs have a hazy bullseye circle around that spot. I candle my eggs on day 6 and they have very clear, numerous veins. I would give yours 2 more days and candle again. If there’s still no sign of life, it might not be fertility, it could be incubation conditions.

 

[Peristeria]

Ok, thanks. I can wait. I was getting mixed reviews all over saying day 4, day 5, day 9, and some websites say don't candle at all. It is so confusing thanks for clearing it up!

 

[Ravenlover]

Just be patient and candle around day 9 i did and it was worth it see