Eldomany, Wael, Abdel-Khalek Abdel-Khalek, Wael Khalil, Ahmed Yousif, Bedir El-Saidy, and Mervat Hassan. 2023. “Influence of Long and Short-Term Progesterone Administration on Estrous Synchronization and Reproductive Performance in Ewes During May Season ”. Journal of Advanced Veterinary Research 13 (1):88-93. https://www.advetresearch.com/index.php/AVR/article/view/1132.