Fig. 6From: Flagellar beating forces of human spermatozoa with different motility behaviorsSemen samples with progressive motility from 80–20%: values of forces exerted by spermatozoa trapped by the tail (n = 16) and by the head/midpiece (n = 10) (a), and comparison of forces exerted by spermatozoa with linear (n = 26) and circular motility (n = 17) (b). Data are reported in box plots (+) shows the mean, while (-) indicates the median valueBack to article page