Do hens lay unfertilised eggs ?

Yes, hens can lay unfertilized eggs. Hens do not require the presence of a rooster (male chicken) to lay eggs. They will lay eggs as part of their natural reproductive cycle, typically producing one egg every 24 to 26 hours, regardless of whether the eggs have been fertilized or not. If a rooster is present and mates with the hens, then some of the eggs may become fertilized, which means that they have the potential to develop into embryos if they are incubated. However, most of the eggs that hens lay in commercial egg production are unfertilized because roosters are not commonly kept in such operations. These unfertilized eggs are the ones you typically find in grocery stores for human consumption.