There was no interaction between the occurrence
of estrus and GnRH treatment (P0.21) and no effect
(P 0.19) of farm location on P/AI. The P/AI was
greater (P 0.0001) in cows that displayed estrus
(61.9%; 258/417) than those that did not display estrus
(41.4%; 128/309). However, P/AI was unaffected by
GnRH treatment (P0.55;Fig. 2).