“…A continued anovulatory periods after a short estrus cycle, more than three weeks have been described by Khattab et al, (1990) and Ghoneim et al, (1999). Yotov et al, (2015) stated to differences in the development of the first dominant follicle and estradiol-17β concentrations during the time of dominant follicles formation in ovulating and nonovulating buffaloes. According to (El-Wishy, 2007a) the start of ovarian activity after calving could be determined form reproductive potential of different buffalo breeds.…”