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The cortical area next to the fertilization cone

Very high power TEM of the cortical area next to the fertilization cone of a stage 1a embryo in vitro, three hours after insemination (original magnification x27,300). 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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Keywords: cell membrane of the embryo, fertilization cone, stage 1a embryo, subzonal space


Source: The Virtual Human Embryo.