Given that fertilizing happens before the egg is laid with chickens, I can't see any reason to describe any chicken egg as "fertile." Either is had been fertilized before being laid, or it never can be fertilized because it's too late.Fertile means capable of being fertilized
I'm guessing that came from an AI, because it doesn't actually make sense. If a fertile egg "has been fertilized by a rooster," how is that different from an egg where "the sperm from a rooster has successfully fused with the egg cell"? It sounds like the same thing in different words.From google: "A "fertile" chicken egg means it has the potential to develop into a chick because it has been fertilized by a rooster, while a "fertilized" chicken egg specifically refers to an egg where the sperm from a rooster has successfully fused with the egg cell, initiating the development of an embryo inside the egg; essentially, a fertilized egg is a fertile egg where the fertilization process has already occurred."
So fertilized is just fertile but taken to the next step of development.
[looked it up on google...] Yup, I find that same AI summary. Those things are wrong so often it's not even funny, for any subject I have yet checked. Sorry, AI, you don't know what you're talking about, please quit confusing real people.