I was perhaps needlessly aggressive but it really annoys me when I see things like this. It takes literally half a second of consideration to realize that it couldn't possibly be a fetus.

It wasn't a fetus because that's not how chicken reproduction works. The farms that produce eggs for sale literally do not have roosters on them, it is physically impossible for it to have been fertilized. Another user has already explained what it was, but it sure wasn't a fetus.

You didn't.