Postpartum Ovarian Resumption in Native Dairy Cows in Upper Egypt and their Relation to Oxidant Antioxidant Status

Derar Refaat Derar^*, Hamdy Salah Hasab-Enaby, Alaa-Edin Zain, Hasan Hussein Ali and Shehata Hasan Shehata

Department of Theriogenology, Faculty of Veterinary Medicine, Assiut University, Assiut, 71526, Egypt

^*Corresponding Author: Derar Refaat Derar, Department of Theriogenology, Faculty of Veterinary Medicine, Assiut University, 71526, Egypt, Tel: +2-088-2334699, Fax: +2-088-2232564 Email: