How to tell if early embryo is dead?

chuckachucka

Crowing
6 Years
Mar 22, 2016
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Is it possible to tell of an embryo is dead very early in the incubation, I.e. In the first five days?

I
have a serama sitting on some shipped eggs. Two look on track at day five (although one has a saddle air cell - different problem). The other two have signs of development for day three maybe: a tiny red circle with some darkish threads and blobs in it, just barely visible with a good candler.

Are they definitely dead or could they just be behind in development for some reason? Is there a way to tell if such a small embryo is dead or alive, or do I just have to wait a couple more days and candle again?

I've seen eggs with bloodrings where embryos have died around day seven, but have never seen eggs die this early before.
 
So I'm thinking there is no clear way to tell if an embryo dies that early. However I noticed in one of the eggs, the little circle and blob was disconnected from the yolk. Surely that means it is a goner? The other one looks better, so I've left them for now.
 

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