Fixed-time artificial insemination (FTAI) programs
using estradiol esters associated with intravaginal progesterone
(P4) devices or norgestomet ear implants have
resulted in satisfactory pregnancy outcomes in suckled Bos indicus cows However, Bos indicus heifers do not respond as effectively to
an intravaginal P4 device compared to Bos taurus or crossbred
heifers