1. Reproduction and Obstetrics Department of Animal Medicine and Surgery, University of León, Spain
2. Laboratory of Equine Reproduction and Equine Spermatology, Veterinary Teaching Hospital, University of Extremadura, Cáceres, Spain
3. Escola Superior Agraria de Elvas, Elvas, Portugal
4. Facility of Innovation and Analysis in Animal Source Foodstuffs, University of Extremadura, Cáceres, Spain
5. Priority Research Center in Reproductive Science, School of Environmental and Life Sciences, University of Newcastle, Callaghan, New South Wales, Australia