No rooster, but white spot in egg?

[Happy Chooks]

I cracked open my first 4 eggs to have for breakfast this morning, and one of the yolks had a white spot in it about the size of a pea.

I don't have a rooster and all my hens are 19 weeks old.

 

[gritsar]

That's normal. It would look like a bullseye if it were fertilized; a white spot with a faint ring and then a white ring around the faint one.