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An embryo at the beginning of hatching

SEM of a stage 3 embryo in vitro at the beginning of hatching (original magnification x 5,000). Notice the variation of nuclear size in the trophoblast.

From: Ménézo et al., 1999. Reproduced with permission of the publisher, Cambridge University Press.

Keywords: beginning of hatching, nucleus, trophoblast

Source: The Virtual Human Embryo.