To understand the double yolk, we have to understand the hen. They have an ovary, which has undeveloped yolks, and an oviduct, which the yolks are sent into as the number of eggs that will come out based on the yolk’s development. The egg comes out by the hour, but in those that produce bigger quantities, at least 2 yolks are out almost simultaneously, hence the double-yolk egg.
It also happens because the system isn’t fully developed to separate one egg at a time. As hens get older, the oviduct will make one single-yolk egg every day.
Double yolk eggs or in rare cases, triple yolk eggs, are formed when the hen releases two or more yolks at once. They move through the reproductive tract and are encased by a single shell.
The question people have sometimes is if double-yoked eggs are safe to eat. The answer: they are. Double-yolk eggs are bigger, weighing at 3.25 oz., while normal eggs are about 2.5 oz. These eggs are quite common to find, but are not seen in cartons because the egg distributions can separate double-yolks from the single-yolks to sell the main bigger eggs to convert then as items that contain the normal eggs.
A double-yolked egg does mean more egg that can be fried or scrambled for our consuming pleasure.
So, don’t panic if cracked an egg of this kind. They are harmless, but the producers have better use for them instead of food. About 1 in 1000 eggs sold contain the double-yolk and, supposedly, it meant good luck was coming. If interested, raise a homesteading chicken flock and go find this egg.
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