Specifically, the mean farrowing duration from the first to the fifth piglet was shorter in crated sows (67 ± 15 min) compared with free farrowing sows provided with limited (119 ± 14 min) or diverse (104 ± 17 min) nest-building material, with a tendency toward statistical significance ( p = 0.053).
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Sow behaviour, parturition process and management in free farrowing systems.
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0.0530
0.0530