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Trophoblast projections

Stage 3 embryo in vitro in the initial stages of hatching showing trophoblast projections through the zona pellucida. The trophoblasts display amoeboid-like movement.

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

Keywords: blastocystic cavity (blastocoele), initial stages of hatching, inner cell mass (embryoblast), mural trophoblast, trophoblast projection, zona pellucida

Source: The Virtual Human Embryo.