Table 15.

Reactive oxygen species (ROS) production by human spermatozoa (n = 51) exposed to NTP of varying time intervals.

ROS [RLU/s/106 sperm]	0 s	15 s	30 s	60 s	90 s
0 h	25.54 ± 3.18	27.93 ± 3.55	29.34 ± 4.00	37.33 ± 3.87 *	45.28 ± 4.62 **
2 h	29.99 ± 4.07	32.33 ± 4.22	34.41 ± 3.57	42.44 ± 4.71 *	51.88 ± 4.86 **

Mean ± SEM. * p < 0.05; ** p < 0.01. Lines: times of NTP exposition. Columns: evaluation times.