How to Tell if an Egg is Fertile or Not
Did you know you can determine if an egg is fertile or not fertile by looking at the germ spot?
The germ spot is the white spot on the yolk. The non-fertile germ spot contains only the female’s cells and looks like a solid white spot. In a fertile egg the germ spot contains both the female and male cells. This allows cells to divide and the spot grows while the rest of the egg is being built in the female’s oviduct. Because of this growth the fertile germ spot on the yolk looks like a circle with a somewhat clear center.
(This information was taken from a book called "Hatching – Classroom Projects" produced by the National 4-H Cooperative Curriculum System, Inc. and is used with their permission.)
We looked at one of our chicken’s eggs the other day when I cracked it for breakfast and sure enough, there was the spot just like they tell you. I won’t tell you if it was fertile or not but… we do have 2 roosters with about 15 hens so chances are… 
Just thought you might be interested to know just what kind of eggs you’re eating…
3 Comments
Mommaofmany
Thank you so much for that information! I try to get eggs from a local fruit stand vendor, but he's usually out. We are searching for alternatives until my friend (who just moved) gets her flock raised and laying!
Momma
Louscrew
Oh, how neat! I can't wait until we can do this. My son will love looking for the spots! Thanks for sharing this science class experience!
Lisa
EagleHeights
So…. if they're fertile, you can still eat them? You know we're going to have to try this.