The average chicken lays about 200-250 eggs a year, and its life span is about 7 years. The laying rate has been decreasing year by year since the third year. So a chicken can probably lay 1000- 1500 eggs in a lifetime.

A normal hen lays an egg a day, and it takes 23-25 hours for each egg to form. Every egg laid by a chicken takes about one day to synthesize in the body, which is a physiological phenomenon of chickens. Individual hens can lay two, three or four eggs a day because of physiological abnormality or fright. But when a hen lays more than two eggs, it is not continuous but intermittent or accidental.

Extended data:

A hen can lay eggs without a rooster. Because female mammals need to mate with male mammals to reproduce, and birds can lay eggs without mating. So hens can lay eggs without mating with roosters.

But if the hen doesn't mate with the rooster, the eggs laid are sperm-free, and the chicken can't hatch and can only be eaten by humans. Therefore, if the chicken farm raises laying hens, not breeders, such hens do not need to mate.

Eggs before fertilization are called azoospermic eggs, and chickens cannot hatch. The egg after mating is not necessarily a fertilized egg. If you can't fertilize because of pathological reasons or the time doesn't match, the eggs will be laid soon, and you can't hatch chickens for the eggs after mating.

Only eggs that have been successfully mated and fertilized are useful to hatch chickens. It takes time for chickens to lay eggs, and each egg needs a certain amount of time to synthesize.