Stage 4 (1 hr 45 min)
4 cell stage
Drown by T. Iwamatsu
(Abbr. )
Stage 4 (1 hr 45 min) 4 cell stage:
The second cleavage furrow develops on the two blastomeres at a right angle to the first cleavage plane. It deepens until each blastomere is divided into 2 of the same size. The oildroplets are larger but fewer and gather toward the vegetal pole.