1. University of São Paulo, Department of Animal Reproduction, School of Veterinary Medicine and Animal Science , Pirassununga, São Paulo 13635-900 , Brazil
2. University of São Paulo, Department of Animal Science, School of Animal Science and Food Engineering , Pirassununga, São Paulo 13635-900 , Brazil
3. North Dakota State University, Department of Animal Science, Center for Nutrition and Pregnancy, NDSU Department 7630 , Fargo, ND 58108-6050 , USA