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Summary Stage Literature (248) Attributions Wiki

Name: NF stage 4 (8-cell)

XAO ID: 1000014

Definition: "Nieuwkoop and Faber stage 4, corresponding to an embryo of age 2 hr 15 min at 22-24 Celsius and having the following external morphological criteria: Advanced eight cell stage. Dorsal micro- and macromeres usually smaller than ventral ones; dorsal micromeres less pigmented than ventral ones. Length: 1.4 - 1.5 mm."

Preceded By: NF stage 3 (4-cell) Succeeded By: NF stage 5 (16-cell)