Fig. 48. Very high power TEM of a stage 2, 2-cell embryo in vitro showing details of mitochondria (original magnification x35,000). Mitochondria are unchanged from those of mature oocytes.
S, smooth endoplasmic reticulum.
(From: Sathananthan and Trounson, 2000. Reproduced with permission of the publisher, Oxford University Press.)
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