How to check if an egg is Fertile or Infertile mobile flashlight.
“candling” is the method used to determine whether incubated eggs are fertile or not. When candling, a bright light is held up to the egg to illuminate the shell’s contents. Candling is best done in dark conditions,
What do fertile eggs look like when you candle them?
Identify the “yolkers.”
When you candle a yolker it will appear quite clear without any signs of development. It will glow. There will be no blood vessels, no dark embryo, and no blood ring. It will look the same way it did when you candled your eggs prior to placing them in the incubator.
How do you tell if a chick has died in the egg?
You’ll see blood pumping through the heart of a tiny, developing embryo if you candle a fertile egg on Day 4. If the embryo dies at this point, you may still see a faint network of blood vessels inside the egg’s contents. An embryo dying at this point will show a large, black eye.
