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. 2016 Mar 31;11(3):e0152445. doi: 10.1371/journal.pone.0152445

Fig 1. Box-plots of trace-element concentrations, patient ages, days of abstinence and sperm-quality parameters.

Fig 1

Groups of men diagnosed with normozoospermia (N), asthenozoospermia (A) and oligoasthenozoospermia (OA) were statistically different with respect to all sperm quality parameters and sperm concentration. No significant difference was found in concentrations of chemical elements among these three groups of patients. Results of Mann-Whitney U test and Tukey HSD showed that A and N groups were statistically significantly different with respect to STR, LIN, “elongation”, VCL and ALH indicating increased expression of spontaneous spermatozoa hyperactivation among patients with normal spermiogram according to WHO criteria. The distribution of sperm quality parameters for OA group of patients was not compared to other two groups as being heavily influenced by “0” values.