Treatment of Inactive Ovaries of Holstein Dairy Cows by Epidural Injection of GnRH Analogue (Receptal) and Its Impact on the Reproductive Hormones, Oxidant/Antioxidant Profile and... oleh Yahia A. Amin, Alaa Eldin Z. Mahmoud, Rana A. Ali, Samer S. Fouad, Obeid Shanab, Rawia M. Ibrahim, Foad Farrag, Mustafa Shukry, Samah F. Ibrahim, Liana Fericean, Ragab Hassan Mohamed