Fig. 49. TEM of a hatching stage 3 embryo in vitro showing the hatching point (original magnification x3,500). One plump zona-breaker cell (ZBC) is stretched around (arrow) the zona opening (O).
BC, blastocystic cavity; F, fragment; TV, trophoblast vesicle; ZP, zona pellucida.
(From: Sathananthan, Menzes, and Gunasheela, 2003. Printed from Reproductive Biomedicine Online.)
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