Figure 1. Percentages of viability and spermatozoa structurally-intact acrosomes of boar spermatozoa subjected to incubation at 37 °C for 90 min after photo-stimulation procedures.

Boar sperm were subjected to separate photo-stimulation procedures and subsequent incubation at 37 °C as described in the Methods section. At the indicated times, aliquots were taken and percentages of viability (a) and structurally intact acrosomes (b) were determined. Results are shown as mean ± SEM. for 12 separate experiments. Asterisks indicate significant (P < 0.05) differences when compared with the respective Control value at the same time point.