Fig. 54. Low power TEM of sequestered cells (SC) of a stage 3 embryo in vitro, 145-170 hours post-insemination (original magnification x5,400). Sequestered cells are located between the zona pellucida (ZP) and the trophoblast (T). They appear as anuclear discarded cells containing chromatin-like material (Ch), vacuoles (V), and mitochondria (M).

(From: Lopata, Kohlman, and Kellow, 1982. Reproduced with permission of the publisher, John Wiley & Sons.)

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