Abdulkareem, Talal, Sajeda Mahdi Eidan, Faris Feisal Ibrahim, Hameed Abdlah Ali, Riyadh George Dano, Abbas Jameel Allwan, & Omar Adel Mohammed. " Effect of GnRH treatment at embryo transfer on pregnancy rate and early embryonic death of Holstein-Friesian cows." Journal of Kerbala for Agricultural Sciences [Online], 5.5 (2018): 690- 696. Web. 24 Nov. 2019