Figure 1.

Comparison of the rate of forward progressive motility among the groups. Boxes depict the 25${}^{\mathrm{th}}$ and 75${}^{\mathrm{th}}$ percentiles with indication of the median and whiskers depict the 10${}^{\mathrm{th}}$ and 90${}^{\mathrm{th}}$ percentiles. *P $<$ 0.05.