Abstract
The aim of this study is to investigate the influence of progesterone concentrations in combination with eCG administration on reproductive performance between Bos indicus and Bos taurus vs Bos indicus influenced heifers. A total of 1200 heifers (n = 600 Bos indicus and n = 600 Bos indicus x bos taurus) will be used. Ultrasonography will be performed at the beginning of the experiment to …