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Intact ovum photographed by ordinary microscopy

Intact ovum photographed by ordinary microscopy. Note the smaller polar body between the two blastomeres at the upper margin of the cleavage plane. The larger polar body below is not clearly in focus. The zona is apparently defective at the lower surface.

Fig. 2. Hertig et al., 1954


Keywords: blastomere, cleavage plane, polar body, zona pellucida


Source: The Virtual Human Embryo.