When eggs gone bad

I was just wondering I have a clutch of 4 in the incubator they are on day 47 but I don't see any dimples on the eggs is this normal? I candeled the eggs I can see the veins and a little movement. About how big should the embryo be inside because the one that I see aren't very big yet.any information would be greatly appreciated thank you for reading my post is there any any wayto know if they are dead inside at this point in time or do I just have to wait it out? My incubator temp is at 89.5

Im on day 56 and 4 out of my 6 eggs has dimples guess some dont dimple in as much as others.

If veins are good and you see movement the eggs are probably just fine, they don't look as full as they really are :)

I'll try to get pics