Where did the veins go?

[loonunit]

So my pastel x pied clutch is pipping all out of sync: I came home and found 3 eggs slit, so I cut the other 3. A couple hours later I've got four with their noses out, (two of which are visibly breathing), one little pastel that keeps giving me the evil eye but hasn't lifted his nose up out of the goo yet... and one het pied that has actually come all the way out. Is that... normal?



And check it out: the eggs that aren't breathing yet still have huge red veins, but the empty egg is completely clean of them. Where the heck did the veins go?


EDIT: Here's the image album if you want to magnify it:

https://picasaweb.google.com/lh/phot...eat=directlink