Development of fertility programs to achieve high 21-day pregnancy rates in high-producing dairy cows

Our objective is to overview the research that lead to the development of fertility programs for high-producing lactating dairy cows using only GnRH and Prostaglandin F2 α (PGF2α), such as Ovsynch with a focus on the role of progesterone in fertility. A key factor affecting fertility to timed-AI is the response to each hormonal treatment of the Ovsynch protocol. Although not required for fertility, cows ovulating to the first GnRH treatment of the Ovsynch protocol (G1) have greater P/AI than cows failing to ovulate.

Source: Theriogenology - March 31, 2018 Category: Genetics & Stem Cells Authors: P.D. Carvalho, V.G. Santos, J.O. Giordano, M.C. Wiltbank, P.M. Fricke Source Type: research