How come this egg has no yolk inside?

Ever seen an egg that comes without any yolk inside? Well, Japanese Twitter user @Chuchnsdboy has.

She had posted photos of her bizarre discovery online on Dec 9 and written, "Housewife for nine years and this is the first time."

Her tweet shook up the Internet, having gotten over 58,000 retweets and more than 76,000 likes to date.

The Twitter user apparently ate the egg after deeming it edible based on online research.

According to AsiaOne, such yolkless eggs are usually detected and sorted out before they are available for consumers.

Known also as called cock's, dwarf, wind, or fart eggs, they are usually formed when a hen produces eggs for the first time, or from complications in the laying process.