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Summary Stage Literature (2025) Attributions Wiki
XB-STAGE-7

Name: gastrula stage

XAO Id: 1000005

Definition: "Embryonic stage during which gastrulation takes place, with a proportion of cells migrating below the surface of the embryo to form two inner layers (endoderm and mesoderm) and the cells which remain outside spreading over the whole surface of the embryo to form the ectoderm; comprising Nieuwkoop and Faber stages 10 to 12.5."


Preceded By: blastula stage Succeeded By: neurula stage

Component Stages:  NF stage 10, NF stage 11, NF stage 12, NF stage 10.25, NF stage 10.5, NF stage 11.5, NF stage 12.5
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