In swine spermatozoa, the damage caused by cryopreservation is more severe than other species, provoking
reduced potential for fertilization. Adjustments in the freezing extender composition may be an
important alternative to increase its efficiency. The objective of this study was to test the efficiency of
different cryoprotectant solutions during cryopreservation of swine semen with a controlled cooling
curve. Three cryoprotectant solutions (5% dimethylformamide, 3% glycerol and the combination of these
two cryoprotectants) were used in association with three base media (powdered coconut water, lactose
and trehalose), constituting nine different treatments. The semen was frozen using a controlled-rate freezer
(TK-3000). After thawing, semen was evaluated for total sperm motility, vigor, morphology, plasma
membrane integrity and acrosome integrity. Cryopreservation with the controlled curve using an automated
system showed satisfactory results, guaranteeing practicality and repeatability for the process
of freezing swine sperm. With this curve, the solutions of lactose, trehalose and powdered coconut water
associated with glycerol, as well as the solution of coconut water containing dimethylformamide, presented
higher quality of sperm compared to the other solutions. Powdered coconut water associated with
dimethylformamide appears as a new solution for swine sperm cryopreservation. The freezing controlled
curve used in this study allowed standardization of the cryopreservation technique.