Fig. 4
From: Semen parameters are seriously affected in acephalic spermatozoa syndrome
The proportion of headless spermatozoa and semen parameter values (intact cells). Box plot displaying the minimum, 25th, median, 75th, and maximum values and of total sperm count, sperm concentration and sperm vitality according to the various groups of the proportion of headless spermatozoa. Group A1 = 0 < PHS ≤ 5%, group A2 = 5 < PHS ≤ 10%, group B = 10 < PHS ≤ 20%, group C=PHS > 20%. Differences between groups were investigated by the nonparametric Mann-Whitney test. * P < .05; ** P < .005; *** P < .0005; **** P < .0001