Chick Embryo

**Definition:** The developmental entity of a fertilized chicken egg (ZYGOTE). The developmental process begins about 24 h before the egg is laid at the BLASTODISC, a small whitish spot on the surface of the EGG YOLK. After 21 days of incubation, the embryo is fully developed before hatching.

**Tree numbers:** - A13.350.150 - A16.331.200

**Synonyms:** - Embryo, Chick