Fig. 13. Very high power TEM of the cortical area next to the fertilization cone of a stage 1a embryo in vitro, three hours after insemination. Notice some of the released products are still attached to the cell membrane of the embryo (arrowheads). SS, subzonal space. |
(From: Sathananthan and Trounson, 1982. Reproduced with permission of the publisher, John Wiley & Sons.) |
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