Producers should take into account that although this new pre-synchronization system called Double-Ovsynch is more labor intensive (adds one more hormonal treatment during pre-synchronization), it has been proven to produce more pregnancies than the standard presynchronization with two prostaglandin injections. Thus, if well implemented, Double-Ovsynch can significantly improve reproductive efficiency in your dairy.
Souza AH; Ayres H; Ferreira R; Wiltbank M. A new pre-synchronization system (Double-Ovsynch) increases fertility at first postpartum timed AI in lactating dairy cows. Theriogenology, Vol. 70, Issue 2, Pages 208 – 215.
Cunha AP; Guenther JN; Maroney MJ; Giordano JO; Nascimento AB; Bas S; Ayres H; Wiltbank MC. Effects of high vs. low progesterone concentrations during Ovsynch on double ovulation rate and pregnancies per AI in high producing dairy cows. J. Anim. Sci. Vol. 86, E-Suppl. 2/J. Dairy Sci. Vol. 91, E-Suppl. 1.