1. Department of Veterinary Clinics; Laboratory of Biotechnology the Animal Reproduction-ReproA; State University of Londrina; Londrina Brazil
2. Department of Large Animal Clinics; Laboratory of Biotechnology and Animal Reproduction-BioRep; Federal University of Santa Maria; Santa Maria Brazil
3. In Vitro Brasil LTDA; Mogi Mirim Brazil
4. Department of Animal Science; McGill University; Sainte Anne de Bellevue Canada