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Double-yolk egg refers to an egg with two yolks in an eggshell, which is usually much larger than a normal egg. Double-yellow eggs are formed because two eggs mature at the same time and are separated from follicles and brought into the fallopian tube, and are wrapped in protein, shell membrane and eggshell in turn in various parts of the fallopian tube. Sometimes even multiple eggs mature at the same time and are brought into the fallopian tube together, thus becoming multi-yellow eggs.
This is similar to the formation process of human fraternal twins, but there are essential differences. Dizygotic twins are two eggs discharged by women during ovulation and fertilized at the same time, which produce two different fertilized eggs and finally develop into twins. However, the egg cells in the double yellow eggs are not fertilized, so they cannot hatch into chickens.
The production of double yellow eggs by poultry is often related to the abundance of food and the health of poultry. Double yellow eggs contain two yolks, which are rich in nutrition and are deeply loved by the masses. Nowadays, people have begun to cultivate double yellow eggs artificially, and there are manufacturers specializing in selling double yellow eggs.
However, some people think that double yellow eggs are produced by female chickens due to endocrine disorders and other physiological reasons, and it is best not to eat too much, but natural double yellow eggs are still rare.