Table 3. A comparison of the treatment and the results during the ARTs obtained in the horse.

Species	Treatment	Results	References
Horse	Nitric oxide	Ensures the spermatozoa motility in cryopreserved equine sperm	de Andrade et al. [82]
Horse	Lipid and protein peroxidation in semen and seminal plasma	Lipid and protein peroxidation on breeding season markers for subfertile stallions	Morte et al. [83]
Horse	Exogenous antioxidants	Ensures spermatozoa ability to withstand the effects of OS	Contri et al. [85]
Horse	Lepidium meyenii (Maca)	Prevents oxidative damages and stabilizes semen quality	Del Prete et al. [86]
Horse	Glucosinolates and macamides present in Maca	Fertility enhancing properties	Tafuri et al. [88]
Horse	Coenzyme Q10 with the a-tocopherol	Maintenance of plasma membrane integrity and functionality	Turunen et al. [89]
Horse	a-tocopherol into the semen extender	Beneficial effects to equine semen parameters	Franco et al. [90]
Horse	Q10 and the a-tocopherol to the semen cooling extender	Increase the levels of total motility and reducing lipid peroxidation of cooled semen	Nogueira et al. [91]
Horse	Caseinate and lactoferrin to equine semen cooling extenders	Beneficial effect on sperm motility and membrane integrity of cooled semen	Martins et al. [92]