Finally, it should be noted that herds that routinely
carried out pregnancy examinations at 28 d after
breeding had higher conception rates than herds that
performed pregnancy examinations at ≥35 d after
breeding (P = 0.02). Early in gestation, the frequency
of embryonic death is high. For example, among cows
diagnosed pregnant at ≤28 d post-AI, 10 to 16% experience
embryonic loss by 56 d post-AI (