Anyway to tell diffence between fertile and non-fertile before bator?

[floridachickhatcher]

Is there any way to tell a fertile egg from a non-fertile one before you put them in the incubator?

 

[carrlr]

If you figure this out, you'd be a very rich person. Seriously though, only way I know is to incubate for a few days and then candle to see if anything is developing.

 

[Magic Birdie]

If you candle them, in a fertilized egg, the dark dot thing is rounder