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Final phase of compaction in an embryo

LM of a stage 2 embryo on day 4 in vitro in the final phase of compaction (compaction 6). Cell membranes are no longer visible in the morula but nuclei and some nucleoli are.

From: Veeck and Zaninovic´, 2003. Reproduced with permission of the publisher, Taylor & Francis Group.

Keywords: blastomere nucleus with nucleoli, compaction, exterior part of blastomere cell membrane, morula, nucleolus, nucleus, polar body, stage 2 embryo, subzonal space, zona pellucida

Source: The Virtual Human Embryo.