In conclusion, giving eCG concurrent with removal
of the norgestomet ear implant increased growth rate of
the LF from implant removal (Day 9) to TAI (Day 11),
diameter of the LF at TAI, and rates of ovulation and the
pregnancy in postpartum Nelore Bos indicus cows. In
addition, GnRH treatment at TAI resulted in more
synchronous ovulation and better pregnancy rates in
postpartum Bos indicus cows synchronized for TAI.
Therefore, giving eCG at implant removal, or GnRH at
TAI, should be considered to enhance reproductive
efficiency in norgestomet-based TAI programs in
suckled Bos indicus cows