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8-cell embryo

TEM of a stage 2, 8-cell embryo in vitro, 60 hours post-insemination. Six blastomeres are shown. Some clumping of organelles and vacuoles are present in the cytoplasm. Polar body remnants are present in the subzonal space.

From: Sathananthan et al., 1986. Reproduced with permission of the publisher, Greenwood Publishing Group.

Keywords: blastomere, eight-cell embryo, organelles, polar body remnants, stage 2 embryo, subzonal space, vacuole(s)

Source: The Virtual Human Embryo.