The objectives of this study were: (1) to determine the maximum diameter and the growth rate of the dominant follicle (DF) in Nelore cows; (2) to determine the interval between PGF2;µ; administration and the manifestation of estrus; (3) to investigate the influence of the DF removal on the number of corpora lutea (CL) and non-ovulated follicles (NOF) determined by ultrasonography (CLus and NOFus); and (4) to de...