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Representative apoptosis images in pig blastocysts after parthenogenetic activation. (A) Terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay of blastocysts (green). Each sample was counterstained with Hoechst 33342 to visualize DNA (blue). Original magnification was 200×. Scale bar = 100 µm. (B) Percentage of apoptotic cells in blastocysts. Bars with an asterisk are significantly different (P < 0.05).
