Abstract:The aim of this study was to evaluate the long-term effects of recombinant bovine somatotropin (rbST) on follicle population and ovulatory follicle development in non-lactating dairy cows. Twenty-one Jersey cows were allocated in rbST (n=11) or control (n=10) groups. On day-60, cows in rbST group received 500 mg of somatotropin (s.c. Lactotropin , Elanco). On day 0, control and rbST cows received an intravaginal progesterone-releasing device (1.9 g, CIDR , Zoetis) and GnRH (100 mg, IM, Factrel , Zoetis).… Show more
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