The white chalazae is much more prominent in the infertile egg. If the egg does not meet a sperm cell in the oviduct it will still be laid by the hen. If you find an egg with an off-color egg white, DO NOT EAT. Maybe I should ship you some! That my friend is a fertilized egg (the white spot is the germinal disc)! The chalazae is composed of mucin fibers; mucin is a special kind of structural protein. The white spot on the yolk will remain white. It’s difficult to … If, however, the egg has been fertilized this white spot will soon become red with blood as the embryo starts to develop. All commercial eggs are scanned and sorted by “candling,” which involves shining a light through the shell to spot defects. White Egg Yolks: To Eat or Not to Eat? Common Egg Shell Quality Problems 1. I say white because, against the dark yellow yolk, it is a faintly lighter color, but the spot is also somewhat translucent. Haha. White banded egg These eggs are the result of two eggs entering and making contact with each other in the shell gland pouch. Black or green spots inside the egg – indicates bacterial or fungal contamination of the egg. 8. Most eggs with blood spots are sorted out by this process, but a few get through. Double yolk eggs generally are larger which can be a cause for concern if it’s too large for your hen to pass – causing her to become egg bound or suffer a vent prolapse. The white spot on the yolk will remain white. Finding an egg with a blood spot in its yolk is pretty uncommon. If you find an egg with black or green spots inside the egg, DO NOT EAT. If the egg does not meet a sperm cell in the oviduct it will still be laid by the hen. But according to Eggland’s Best, “as an egg ages, the yolk takes up water from the albumen [egg white] to dilute the blood spot so, in actuality, a blood spot indicates that the egg is fresh.” I think the whole carton (of 30 eggs) has white yolks inside, since I was just baking and opened another 5 eggs which also had white yolks. They are call chalaza and are strands of protein that hold the egg yolk centered in the albumen. The white spot you are referring to is the germinal disc. It’s also rare for us to get an egg with a blood spot. The Egg Yolk. A fertilized egg has a tiny “white” spot. An egg yolk is basically a bag of concentrated food for the development of a chicken embryo if the egg is fertilized. An infertile and a fertile egg. However there is no correlation between fertility and the size of the chalazae. The fresher your egg is the more prominent the chalazae are and they are perfectly edible. If, however, the egg has been fertilized this white spot will soon become red with blood as the embryo starts to develop. Can you tell the difference? Meat spots Description Most meat spots are pieces of tissue from body organs, but some may be partially broken-down blood spots. But the embryo will not develop because the egg has not been fertilized. Occasionally blood may be diffused through the albumen or white of the egg. Egg inside an egg. Wrong on both accounts, Dan.