Worm in Egg??

[Arya28]

So I'm making breakfast, and find this in one of the eggs in the pan. This is the second egg from one of my Easter Eggers. Is this anything that anybody knows is a type of worm? And if so references please! But could it be a part of the egg? There is a rooster in the pen so most of the eggs are fertilized but I haven't seen anything like this in them before. We gave them anti parasitic herbs yesterday so that's another reason I'm thinking that. I'm completely freaked out right now and don't know if I dare to eat the other eggs in the pan! (Warning: the pictures look kinda gross)

 

[Wyorp Rock]

The dark part could be a meat spot in the egg along with part of the Chalaza.
http://boredomtherapy.com/egg-yolk-chalaza/
http://www.backyardchickens.com/a/common-egg-quality-problems

 

[Arya28]

Thank you! Yes we decided we think that's what it is. We didn't eat that egg but we ate the rest of the eggs in the pan. Lol