I am new to this, too, and I would be concerned about them having been stored in the fridge, but you might still be okay. I candled eggs at day 8 on Sunday, and saw a mass in the middle but no veins. So for comparison I candled a non-fertilized egg in the fridge, and it was completely clear. You can't see the yolk, so I asked a friend on here and she's says as long as there is something that's a sign of life.
