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The present study consisted of two experiments. In the first one, ejaculates from four boars were used to compare in vitro penetration (IVP) rates of fresh and vitrified swine oocytes by homologous spermatozoa in four treatments: fresh oocytes in conventional incubation (CO 2 incubator) (FC), vitrified oocytes in conventional incubation (VC), fresh oocytes in submarine (bag) incubation (FS)...