1.The Effect of Administration of Different Levels of GnRH on the Day 0, 5 and 12 Post-Insemination on Progesterone Concentration in Dairy Heifers

A. Karimi, H. Karami Shabankareh and M. M. Moeini

Pakistan Journal of Biological Sciences 10 ( 20 ): 3620 - 3625 , 2007