Effect of circulating progesterone concentration during synchronization for fixed-time artificial insemination on ovulation and fertility in Bos indicus (Nelore) beef cows - Sales, José Nélio Souza; Carvalho, J. B. P; Crepaldi, Gabriel Armond; Soares, Julia Gleicy; Girotto, R. W; Maio, Jose Ricardo Garla; Souza, J. C; Baruselli, Pietro Sampaio (Theriogenology, 2015)