Why do hens lay eggs (related questions)?

When a hen lays eggs, it is equivalent to the hen discharging eggs. This egg will form an egg-like shell in the mother machine, and it will produce eggs whether fertilized or not. So chicken farms can only raise hens and harvest eggs. The eggs we buy in the daily supermarket are basically unfertilized eggs.

Hens themselves have eggs, and they are bigger than people. After killing chickens and ducks, there are immature eggs in the ovaries of chickens and ducks of different sizes, which are generally eaten by people.

When the soft egg leaves the ovary, the soft membrane on the outer layer of the egg gradually hardens until it is excreted (but sometimes it has not formed a hard shell until it is excreted, which is usually called a soft-shelled egg). If it is fertilized, it can hatch chickens, but if it is not fertilized, it will not hatch chickens. The hen's egg is the later egg.

Extended data:

The process of independent development of fertilized eggs outside the mother's body in animals is called oviposition. Egg-laying animals refer to animals that reproduce by laying eggs. Birds, reptiles, most fish and insects are almost oviparous. For example, chickens, ducks, fish, frogs, turtles and butterflies are all egg-laying animals. After laying eggs, oviparous animals become animals after hatching, and their nutrition comes from the eggs themselves.

Oviposition is a reproductive mode in which fertilized eggs of animals hatch outside the mother's body and develop into new individuals. The process of independent development of fertilized eggs outside the mother's body in animals is called oviposition. The characteristic of oviparous is that in embryonic development, it depends entirely on the yolk contained in the egg itself as nutrition.

References:

Baidu encyclopedia-spawning