1. M. S. Ullah:
Department of Animal Reproduction, University of Agriculture, Faisalabad, Pakistan
2. M. Ahmad:
Department of Animal Reproduction, University of Agriculture, Faisalabad, Pakistan
3. N. Ahmad:
Department of Animal Reproduction, University of Agriculture, Faisalabad, Pakistan
4. I. Ahmad:
Department of Animal Reproduction, University of Agriculture, Faisalabad, Pakistan
5. M. Z. Khan:
Department of Veterinary Pathology, University of Agriculture, Faisalabad, Pakistan