What variables can affect the number of eggs laid by a chicken?

The number of eggs laid by a chicken depends on a number of factors mainly includes the food it is being fed upon and it is properly fertilized or not.

Other factors also impact the egg laying capacity in chicken such as time of the year that means the number of daylight hours effect the egg laying capacity. The breeds of chicken also determine the number of eggs it lays.  The age of hen is also a key important variable in terms of egg laying as maximum eggs are laid in the initial couple of years and then it decreases with age.

when it is at an intermediate population density