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Table 5 Association days to first service, inter-service interval and number of service per-conception with other variables

From: Success rate of artificial insemination, reproductive performance and economic impact of failure of first service insemination: a retrospective study

  Days to First Service (N = 2052) Inter-service interval (N = 276) NSPC (N = 2052)
Variables Categories EMM (days) ± SE p-value EMM (days) ± SE p-value EMM (days) ± SE p-value
Genotype Local 155 ± 4.86 0.0015 37.4 ± 3.04 0.4025 1.14 ± 0.025 0.555
Crossbred 138 ± 2.06   40.1 ± 1.21   1.15 ± 0.0098  
Calving type PTC 142 ± 3.29 0.3020 43.5 ± 2.54 0.1331 1.11 ± 0.0123 <.0001
FTC 137 ± 3.60   38.6 ± 2.06   1.19 ± 0.0134  
Fertility Normal 89.2 ± 2.56 < 0.0001 25.4 ± 5.75 0.0006 1.07 ± 0.0316 <.0001
Subfertility 167.3 ± 1.85   46.7 ± 1.98   1.27 ± 0.0227  
Parity Prim/Heifer 37.2 ± 3.23 0.059 1.14 ± 0.026 0.0427
Multiparous 140 ± 1.91   44.4 ± 1.99   1.20 ± 0.018  
NSPC First AI 142 ± 2.67 0.1469 <.0001
Second AI 133 ± 6.11   36.0 ± 1.46  
Third AI 114 ± 16.72   79.1 ± 4.24  
AI Season Summer 137 ± 3.49 0.7656 35.2 ± 1.99 0.001 1.15 ± 0.0169 0.8676
Spring 141 ± 3.72   34.7 ± 2.18   1.14 ± 0.0183  
Winter 142 ± 3.81   45.8 ± 2.18   1.16 ± 0.0184  
Autumn 142 ± 4.42   45.6 ± 2.53   1.14 ± 0.0198  
Calving Season Summer 142 ± 4.63 0.5992 41.5 ± 3.09 0.002 1.15 ± 0.0182 0.8784
Spring 144 ± 4.91   45.9 ± 3.27   1.15 ± 0.0187  
Winter 137 ± 5.32   47.2 ± 3.62   1.14 ± 0.0195  
Autumn 136 ± 4.66   32.2 ± 2.75   1.16 ± 0.0169  
  1. EMM estimated marginal means