Synchronization treatments previous to natural breeding anticipate and improve the pregnancy rate of postpartum primiparous beef cows

days) cows. Thus, the use of TNB, especially when associated with eCG, efficiently improved the early conception of postpartum primiparous beef cows after exposure to NB. The increased number of cows conceiving early in the BS is crucial to improve reproductive efficiency by reducing the interval between parturitions and improving the number of pregnant cows at the end of BS, thus resulting in greater farm income.