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Table 1 Reproductive parameters (WEI; LBP, live born piglets; SBP, stillborn piglets; MM, mummies) and reproduction indicators (ER, estrus rate; FR, farrowing rate; FEI, farrowing efficiency index; LPI, live piglet index) for both treatment groups (C-group, control group, n = 289; P-group, peforelin-treated group, n = 279) and different parity groups (gilts, 1st parity sows, 2nd–4th parity sows and 5+ parity sows), expressed as means ± SEM and their significance level

From: An evaluation of gonadotropin-releasing hormone analogue administered to gilts and sows on subsequent reproductive performance and piglet birth weight

  C-group P-group Significance level
WEI overall 6.11 ± 0.33 6.82 ± 0.44 P > 0.05
WEI ≤ 7 d pw 5.08 ± 0.26 5.10 ± 0.34 P > 0.05
LBP 14.7 ± 0.20 14.4 ± 0.19 P > 0.05
 LBP – gilts 13.76 ± 0.49 13.95 ± 0.47 P > 0.05
 LBP – 1st parity 14.47 ± 0.61 13.39 ± 0.53 P > 0.05
 LBP – 2nd–4th parity 15.07 ± 0.22 14.73 ± 0.23 P > 0.05
 LBP – 5+ parity 13.40 ± 0.079 13.83 ± 0.54 P > 0.05
SBP 0.18 ± 0.07 0.80 ± 0.08 P > 0.05
MM 0.38 ± 0.07 0.28 ± 0.04 P > 0.05
ER 87.2 % 93.2 % P < 0.05
FR 81.3 % 85.7 % P > 0.05
FEI 70.9 % 79.9 % P < 0.05
 FEI – gilts 42.9 % 82.6 % P < 0.0001
 FEI – 1st parity 65.5 % 74.2 % P > 0.05
 FEI – 2nd–4th parity 78.5 % 82.5 % P > 0.05
 FEI – 5+ parity 71.4 % 68.5 % P > 0.05
LPI 1032 1151 P < 0.01
 LPI – gilts 590 1152 P < 0.0001
 LPI – 1st parity 948 994 P > 0.05
 LPI – 2nd–4th parity 1183 1215 P > 0.05
 LPI – 5+ parity 957 947 P > 0.05