Table 4

^Table
4

^{Summary of Studies on Feeding Supplemental Protein} ^{During
Gestation on Calving Difficulty, Subsequent Reproductive} ^{Performance
and Calf Growth (Selk, 2000).}

Researcher	Supplementationa	Summary of Effects
Wallace & Raleigh, 1967	HP^a vs LP for 104 - 137 d prepartum	HP increased cow wt., birth wt. and conception rate but decreased dystocia
Bond & Wiltbank, 1970	HP vs MP throughout gestation	HP had no effect on birth wt or calf survivability
Bellows et al. 1978	HP vs LP for 82 d prepartum	HP increased cow wt., cow ADG, birth wt., dystocia, weaning wt. and decreased conception rate
Anthony, et al. 1982	HP vs LP for 67 d prepartum	HP had no effect on birth wt., dystocia or postpartum interval
Bolze, et al.1985	HP vs MP vs LP for 112 d prepartum	HP had no effect on birth wt., dystocia, weaning wt., milk or conception rate but decreased the postpartum interval

aHP = high protein (over 100% NRC); MP = moderate protein (approximately 100% NRC); LP = low protein (under 100% NRC)