how can you tell if eggs are successfully fertilized?

Discussion in 'Incubating & Hatching Eggs' started by austindon, Dec 25, 2013.

  1. austindon

    austindon In the Brooder

    Sep 21, 2013
    any tricks to telling if you have a successfully fertilized egg? i read about candling but don't know what that means. what do you do with the candle, how do you do it and what do you look for? thank you.
  2. sourland

    sourland Broody Magician Premium Member

    May 3, 2009
    New Jersey
    Candling, is shining a bright light through an egg in a darkened environment so that the inside of the egg is visible. Candling only indicates fertility if an egg has been incubated with resultant vein and embryo development. Do a forum search on candling. There are some great threads. Also do a search on 'Fertile eggs bulls eye'. Every egg has a single cell nucleus visible on the yolk. A fertile egg prior to incubation will go through a few cellular divisions resulting a bulls eye like appearance of the nucleus.
  3. 1muttsfan

    1muttsfan Crowing

    Mar 26, 2011
    Upper Peninsula Michigan
    As Sourland says, the only two ways to tell if an egg is fertile is to crack it open and look for the bullseye, or to incubate it and see if it develops.

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