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Table 4 Comparisons of reproductive performances1 between severe repeat-breeder (SRB) and non-SRB sows

From: Characteristics and risk factors for severe repeat-breeder female pigs and their lifetime performance in commercial breeding herds

  Female pigs
  Non-SRB SRB
Parity Mean (± SE) Mean (± SE)
Farrowing rate for first service in the previous parity, %
 Parity 1 87.6 (0.54)a 82.4 (2.07)b
 Parity 2 88.6 (0.49) 84.6 (2.51)
 Parity 3 92.4 (0.38) 96.5 (2.45)
 Parity 4 92.9 (0.34) 89.5 (2.88)
 Parity 5 93.2 (0.36) 93.2 (3.96)
 Parity 6 94.5 (0.31) 93.4 (4.24)
Weaning-to-first-mating interval in the previous parity, days
 Parity 2 8.3 (0.19) 7.5 (0.73)
 Parity 3 6.4 (0.10) 6.8 (0.59)
 Parity 4 6.1 (0.10) 6.3 (0.67)
 Parity 5 5.9 (0.10) 5.2 (0.88)
 Parity 6 5.7 (0.09) 5.6 (0.98)
  1. 1Reproductive performances are measured at the previous parity before the SRB females became SRB
  2. a,bMean values within a row fallowed by different letters differ (P < 0.05)