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Plump zona-breaker cells near the hatching point

TEM of a hatching stage 3 embryo in vitro showing plump zona-breaker cells in the trophoblast close to the hatching point (original magnification x5,100).

BC = blastocystic cavity (blastocoele)
Mv = surface microvilli
ZP = zona pellucida.

From: Sathananthan et al., 2003. Printed from Reproductive Biomedicine Online.

Keywords: blastocystic cavity (blastocoele), hatching point, surface microvilli, trophoblast, zona breaker cells, zona pellucida

Source: The Virtual Human Embryo.