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Summary Stage Literature (389) Attributions Wiki

Name: NF stage 18

XAO ID: 1000034

Definition: "Nieuwkoop and Faber stage 18, corresponding to an embryo of age 19 hr 45 min at 22-24 Celsius and having the following external morphological criteria: Neural groove stage. Anterior part of neural plate narrow, more or less club-shaped, often narrower towards rostral end. Parallel neural folds in trunk region very close to each other, not yet touching. Length: 1.5 - 1.6 mm."

Preceded By: NF stage 17 Succeeded By: NF stage 19