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Summary Stage Literature (0) Attributions Wiki
XB-STAGE-13

Name: NF stage 2 (2-cell)

XAO ID: 1000011

Definition: "Nieuwkoop and Faber stage 2, corresponding to an embryo of age 1 hr 30 min at 22-24 Celsius and having the following external morphological criteria: Advanced two cell stage. First cleavage groove has reached vegetal pole. Ventral side of blastomeres darker than dorsal side. Length: 1.4 - 1.5 mm."
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Preceded By: NF stage 2- Succeeded By: NF stage 3 (4-cell)