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Summary Stage Literature (376) Attributions Wiki

Name: NF stage 13

XAO ID: 1000023

Definition: "Nieuwkoop and Faber stage 13, corresponding to an embryo of age 14 hr 45 min at 22-24 Celsius and having the following external morphological criteria: Slit-blastopore stage. Neural plate faintly delimited; slight elevation of its rostral part and slight flattening of its caudal part. Caudal part of median groove formed. Length: 1.5 - 1.6 mm."

Preceded By: NF stage 12.5 Succeeded By: NF stage 14