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XB-STAGE-21
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Name: NF stage 9
XAO ID: 1000019 Definition: "Nieuwkoop and Faber stage 9, corresponding to an embryo of age 7 hr at 22-24 Celsius and having the following external morphological criteria: Fine-cell blastula stage. Animal cells smaller at dorsal than at ventral side. Border between marginal zone and vegetative field distinct, particularly dorsally, owing to difference in cell size. Length: 1.4 - 1.5 mm." |
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| Preceded By: NF stage 8 | Succeeded By: NF stage 10 |