eggs with a high intensity light source (such as the Brinsea Egg-lume)
to gauge the extent of embryo development and air space increase during
incubation. Break open unhatched eggs.
Clear when candled - probably
infertile (or very early death) when candled at 8 days.
2. Fertile with red blood vessels - after 8 days.
3. Red or black staining - early death when candled at 8 days.
4. Embryo with red blood 'ring' - early death when candled at
5. Dark outline with ill defined detail - late death (10-16 days).
6. Live embryo with bill in air sack - due to hatch in 24-48
7. Normal development of the air pocket according to number of days.
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