Equine chorionic gonadotropin and gonadotropin-releasing hormone enhance fertility in a norgestomet-based, timed artificial insemination protocol in suckled Nelore (Bos indicus) cows - Sá Filho, Manoel Francisco de; Ayres, Henderson; Ferreira, R. M; Marques, M. O; Reis, E. L; Silva, R. C. P; Rodrigues, C. A; Madureira, Ed Hoffmann; Bó, G. A; Baruselli, Pietro Sampaio (Theriogenology, 2010)