Question

how do hens fertilise?

Answer 1

Hey mate here is your answer》》

The egg white gathers around the yolk in the magnum. ... Most hens won't lay eggs in the evening, so if a hen's egg is ready then, she will likely hold it until morning. Once she does lay, she's ready to start forming a new egg. After mating, enough sperm may remain in the hen to fertilize her eggs for a week or more.

Hope this answer will help you..《《

Answer 2

Hello mate,

Here is your answer,

For the eggs to be fertilized, the hen and rooster must mate first, and this process must occur prior to the formation of the egg. Thus, if the hen has mated and she lays an egg, then that egg is fertilized.  You can tell fertilized chicken eggs apart from unfertilized ones by candling eggs.