In my experience with corn snake eggs, when the entire egg has a red glow or tint it's actually infertile. A fertile egg is 'yellow-clear' with red veining over the surface. In the photo of the entire clutch, going left to right, and top to bottom, numbers 1, 2, 4 and 5 appear to be infertile due to their irregular shape, odd color, and 'shiny' appearance.
As to the others, I've had seemingly 'good' eggs start with that ring of blood vessels and then never progress. If you don't end up with a network of veins soon, the eggs will eventually die as there won't be enough venous support for the developing embryo. I'll try to find my photos of "if you can do this to the eggs, they are slugs" and post them.
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