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Summary Stage Literature (429) Attributions Wiki
XB-STAGE-20

Name: NF stage 8

XAO Id: 1000018

Definition: "Nieuwkoop and Faber stage 8 (128-cell stage), corresponding to an embryo of age 5 hr at 22-24 Celsius and having the following external morphological criteria: Medium-cell blastula stage. Surface not yet entirely smooth. Border of animal pigment cap more diffuse at dorsal than at lateral and ventral sides. Gradual transition in cell size from animal to vegetative pole. Length: 1.4 - 1.5 mm."


Preceded By: NF stage 7 Succeeded By: NF stage 9
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