I had a similar thing happen with a group of eggs I got from a WC girl - they first candled empty and glowed yellow - I figured infertile and they'd die off - but I stuck them in the incubator anyway - about a week later I candled them again and found small masses with feint veining around the bottom - so I had a little hope - but about two weeks in they started dying off.

I would say if they are glowing yellow when candled - they aren't likely to make it - if they are glowing pink you have a shot.