The effect of circulating progesterone on magnitude of the GnRH-induced LH surge: are there any differences between Bos indicus and Bos taurus heifers? - Batista, Emiliana de Oliveira Santana; Del Valle, Tiago Antônio; Ortolan, Mariana Dulce Delle Vedove; Rennó, Francisco Palma; Nogueira, G. P; Souza, A. H; Baruselli, Pietro Sampaio (Theriogenology, 2017)