Both chemically and nutritionally, eggs with blood spots are safe to eat.
Eggs with a visible blood spot on the yolk are safe for consumption. The spot can be removed with the tip of a knife. Blood or "meat" spots are occasionally found on an egg yolk and are merely an error on the part of the hen. These tiny spots are not harmful and are caused by the rupture of a blood vessel on the yolk surface when it's being formed or by a similar accident in the wall of the oviduct.
Blood spots do not indicate a fertilized egg (I don't have a rooster so that would be a big surprise). If desired, the spot can be removed with the tip of a clean knife prior to cooking.No, the egg is not contaminated. You can’t see bacteria with the naked eye.
These eggs are safe to eat.
For some reason now that the hens are laying again, I've had some eggs with blood spots. It's good to know I can still eat them but thank goodness I have enough I don't have to eat those eggs (I know - there's starving folks out there that would love these eggs but Lily needs an egg now and then too).