Usually if a blood ring develops after normal development of the embryo, it's a sign of an early quitter...but I guess it wouldn't hurt to let it go a few more days to be sure.I'd wait a few more days. I threw out an egg like that and after I cracked the egg in two a little baby was moving around. I had killed it. I felt horrible, I always heard blood rings meant dead but it wasn't so. Just wait.