EVALUATING SPERM DNA FRAGMENTATION INDEX USING TUNEL ASSAY FORUNEXPLAINED INFERTILITY: ITS ASSOCIATION WITH DEMOGRAPHIC ANDLIFESTYLE FACTORS

Abstract

Infertility has been affecting globally, influenced by both men and women factors. Evaluation of
female factor and male factor using traditional semen analysis were carried out on the routine
basis. In our study findings, we observed males with normal semen analysis report have
abnormal readings of DNA fragmentation index (more than 12%).We assessed the DNA
integrity using TUNEL assay by measuring the sperm DFI using flow cytometry. Demographic
and lifestyle information including age, smoking habit, alcohol consumption, occupational status,
educational profile, clothing type and dietary factors were noted. It was observed that smoking,
alcohol and non-vegetarian diet were associated with increased values of DNA fragmentation
(>12%). Out of total 110 subjects, 51% were having normal values of DFI whereas 49% of the
subjects showed high DFI values. Maximum DFI calculated was 42.5%, which was much higher
than the threshold value. The major lifestyle factors discussed in the present study are amongst
the potential risk factors that could impair the male fertility. Thus, greater awareness and
recognition provide better treatment options for those couples seeking conception.