The treatment with eCG at norgestomet implant with drawal
increased the growth rate of the LF from the time of
implant removal until FTAI, the diameter of the LF at FTAI,
ovulation rate, the probability of ovulation at the end of
the protocol when only small- or medium-sized LF were
observed in the ovaries at implant removal, the concentrations
of P4 in the subsequent estrous cycle, and pregnancy
outcomes in Nelore (Bos indicus) heifers submitted to FTAI
programs. Also, the presence of a CL at the beginning of the
protocol affected the fertility in response to FTAI and may
be an important variable to be evaluated in progestin-based
FTAI programs in Nelore heifers.