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The effect of paternal age on sperm DNA fragmentation and decondensation was determined in a retrospective study involving 1769 patients. TdT (terminal deoxynucleotidyl transferase)-mediated dUDP nick-end labelling (TUNEL) assay was used to assess fragmentation, and DNA decondensation was measured with either chromomycin or aniline blue staining. The impact of atypical forms was also analysed. DNA...
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