Abstract
The aim of the project is to optimize the reproductive efficiency of dairy cows in Brazilian herds. The commonly FTAI protocol in Brazil is based on estradiol (E2) and progesterone (P4), however, 60% of the cows do not synchronize perfectly, in addition, the use of presynchronization did not improve the efficiency of the E2/P4 based protocols in synchronizing the cows. Conversely, gonadot…