Active caspases 3 and 7 of stallion spermatozoa stored during five days (day 1 D1 to day 5 D5) at 5°C FE fresh extended sperm, CC sperm processed through colloidal centrifugation.

High activity are spermatozoa with high caspase 3 an 7 activity, low activity are spermatozoa with low caspase 3 and 7 activity and dead sperm correspond to necrotic (Ethidium positive spermatozoa). Within a row values with different superscript differ statistically, a-b p