In the Present study, the effect of age at first calving (AFC) were assessed on productive herd life, longevity and life time calf production. The overall means for productive herd life (days), longevity (days), total calves born to each cow, total female calves born to each cow, total female calves reaching milking herd from each cow were, 1597.30+1056.47, 3341.15+1167.79, 4.37+2.71, 2.14+1.84 and 0.91+1.08, respectively. The effect of age at first Calving was significant on longevity, total female calves born to each cow and non significant on productive herd life, total Calves born to each Cow and total female Calves reaching milking herd from each Cow.

Keywords: Age at first calving, Longevity, Productive herd life, and Lifetime Calf production