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Table 5 Parity effects on litter traits from Experiment 2

From: Glucosamine supplementation during late gestation alters placental development and increases litter size

  Parity
Variable 2 3 4 5 6 7 8
Total borna 14.7 ± 0.6(40)b 15.3 ± 0.5(60) 15.5 ± 0.7(31) 16.4 ± 0.8(25) 17.3 ± 0.7(29) 14.4 ± 0.6(46) 14.5 ± 0.8(24)
Born alivea 13.8 ± 0.6 14.1 ± 0.5 14.4 ± 0.6 14.6 ± 0.7 15.3 ± 0.7 12.6 ± 0.5 12.6 ± 0.7
Mummies 0.29 ± 0.14 0.59 ± 0.12 0.64 ± 0.16 0.53 ± 0.18 0.72 ± 0.17 0.69 ± 0.13 0.48 ± 0.18
Birth weightsc 1.45 ± 0.04 1.45 ± 0.03 1.40 ± 0.04 1.39 ± 0.04 1.33 ± 0.04 1.34 ± 0.03 1.33 ± 0.05
Weaning weightsd 5.29 ± 0.09 5.30 ± 0.08 5.34 ± 0.12 5.38 ± 0.12 5.57 ± 0.11 5.67 ± 0.09 5.64 ± 0.13
Preweaning mortality 0.14 ± 0.02 0.15 ± 0.02 0.17 ± 0.02 0.18 ± 0.02 0.16 ± 0.02 0.22 ± 0.02 0.19 ± 0.03
  1. aContrasts indicated a progressive increase to parity 6, followed by a precipitous decrease (P < 0.05). Litter size trait, birth and weaning weight least squares means for second through eighth parity sows from Exp. 2 are presented
  2. bNumber of observations are in parentheses
  3. cContrasts indicated no differences among parities 2 through 6, and a decrease in parities 7 and 8 (P < 0.01)
  4. d Contrasts indicated a progressive increase from parity 2 to 8 (P < 0.05)