Fig. 46. High power light micrograph of a hatching stage 3 embryo in vitro showing the hatching point (HP) (original magnification x1,000). Notice the plump, zona breaker cells (ZBC) at the hatching point. One of the zona-breaker cells is in metaphase (arrow).
BC, blastocystic cavity; HP, hatching point; ZP, zona pellucida.
(From: Sathananthan, Menzes, and Gunasheela, 2003. Printed from Reproductive Biomedicine Online.)
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