First of all, from the origin of double yellow eggs, eggs in the hen's stomach develop from an egg cell to yolk, then protein solution, egg membrane, and then to the eggshell, hardening and other processes. Then, because some laying hens are in their youth, strong, and ovulate more than ordinary laying hens, they form double yellow eggs after the above processes, which is also related to the genetic inheritance of different varieties of laying hens. The double yellow looks bigger than ordinary eggs in appearance. The picture below shows double yellow eggs, which can be identified by an egg-lighting device and by a flashlight at home.

The above mentioned the formation process of eggs, especially the formation process of double yellow eggs. Let's talk about the hatching principle of eggs here. In fact, we have always had misunderstandings about the hatching of eggs into chickens. When an egg is not fertilized, it is just an egg, which can be compared to an egg cell, which is rich in nutrition. This is a * * * knowledge, but the fertilized egg that really develops into a chicken embryo does not exist in the yolk, but in the thick egg white in the egg white, close to the surface of the yolk. The picture below shows the chicks hatched by my hen.

If these two double yolks are lucky and fertilized, of course, the eggs in the laying hen farm can't be fertilized. The rooster and hen are raised separately, and the early embryos are well developed. This is also very difficult, because fertilized eggs need to breathe during development, and both double yellow eggs and single yellow eggs have only one air chamber. The air chamber is fertilized eggs and exchanges air with the outside world through the air chamber, so the air is thin, which is a difficult task. Secondly, if chicken embryos develop into chickens, Then, will the chicken be conjoined, deformed and pecked open? Because of the congenital deficiency of early embryo development, if one egg yolk is fertilized, one egg yolk is unfertilized, one egg yolk will affect the other, and there are two eggs that are not fertilized, then the chicken will not hatch.

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. China folklore regards "double yellow eggs" as auspicious food that can bring people good luck and peace. At the end of August, 2009, there were many "double yellow eggs" at the awarding ceremony of the 3rd 13 film China Watch Awards in China. Japanese folklore also regards "double yellow eggs" as a symbol of "a hundred years of harmony" between husband and wife, and uses them as festive gifts for wedding or wedding anniversary.