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Microphotographs showing fluorescent TUNEL staining of blastocysts derived from mature mouse oocytes. Nuclei are stained blue (A: DAPI) and apoptotic blastomeres appear green (B: TUNEL). Merged capture, 400× (C). TUNEL indicates terminal deoxynucleotidyl transferase-mediated 2′-deoxyuridine, 5′-triphosphate nick end labeling; DAPI, 4,6-diamidino-2-phenylindole.
