embryonic stage 4 [FBdv_00005306]

Nuclear division 10-13. Polar buds divide twice and become tightly grouped at the posterior pole by the end of this stage. Nuclei visible at the rim of the embryo. Stage 4 ends with the beginning of cellularization. Duration at 25 degrees C: approximately 50 minutes (80-130 minutes after egg laying).

embryonic stage 4

ID: FBdv_00005306

Stage

Temporal ordering number - 170.

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## Classification

developmental stage

Relationships

immediately preceded by: embryonic cycle 9, embryonic stage 3, pre-blastoderm stage
substage of: blastoderm stage

Alternative Names

Synonym	Scope	Reference
syncytial blastoderm stage	exact synonym	Campos-Ortega and Hartenstein, 1997

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