P=0.817, respectively). Durations of the luteal phase, inter-luteal
interval and cycle length prior to the first postpartum estrus were
similar for all lameness scores (P=0.970, P=0.878, P=0.993,
respectively; Table 3). This was probably due to there being no
effect rather than too small a sample size as post hoc power
analysis calculations reveal that between 300 and 1728 animals
would be needed for the observed differences in means to be
significant at P=0.05.