Fertilized Egg a Bullseye?

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Heidi

Heidi

Songster
12 Years
Mar 18, 2007
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Northwest Michigan
On an earlier thread by siz8003 she showed a pic of two just layed eggs. Someone mentioned that one of them had a bullseye (fertilized egg). Exactly how can one know that it is a bullseye or a fertilized egg? Someone PLEASE explain.
 
If you look at an egg, there is a white spot on every yolk, called a blastodisc. When fertilized, there is a white circle around that and then it's called a blastoderm because it is fertile. Here are pics of fertile eggs for reference:
FertileeggYolk.jpg

fertileyolkegg.jpg

DCP_6409.jpg
 
Last edited:
No, if you candled them, no matter how powered your light, you wont be able to resolve the speck. With a high powered light, the earliest you can see an embryo would be about stage 14 when the blood ring develops. That is just over 60 hours of incubation. Chances are though you wont be able to see anything with brown eggs or normal lights.
 
I knew you would answer my question speckledhen! Thanks so much - I just gave my husband 101 on a fertilized egg too. You are always so helpful to all of us new chicken mom's. Thanks again!
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