1. Department of Biological Sciences, Faculty of Science, University of Bamenda, Bamenda, Cameroon
2. Animal Reproduction Physiology Laboratory, Institute of Agricultural Research for Development (IRAD), Bambui, Cameroon
3. Department of Biochemistry, Faculty of Science, University of Dschang, Dschang, Cameroon
4. Department of Animal Biology, Faculty of Science, University of Dschang, Dschang, Cameroon