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XB-STAGE-27
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Name: NF stage 15
XAO ID: 1000025 Definition: "Nieuwkoop and Faber stage 15, corresponding to an embryo of age 17 hr 30 min at 22-24 Celsius and having the following external morphological criteria: Early neural fold stage. Presumptive cement gland faintly circumscribed. Anterior part of neural plate roundish. Neural folds distinct, except medio-rostrally; initial formation of sharp inner ridges on neural folds in rhombencephalic region. Length: 1.5 - 1.6 mm." |
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| Preceded By: NF stage 14 | Succeeded By: NF stage 16 |