Fifty-six cows that became lame within 60 d postpartum and 157 healthy cows (controls) were used in the study. The results from the following variables were analysed: calving to the first service interval, calving to conception interval, conception rate at the first service, and overall conception rate. Lameness was associated with a statistically significant 9 d increase in the interval from calving to the first service. In the lame cows, the interval from calving to conception was by 27 d longer (P<0.05) than those in the control cows. The conception rate at the first service was 41.4% (control - 54.6%). The serum vitamin E concentration was lower in the cows with lameness than that in the control cows: 2.31±0.24 µg/mL versus 2.44±0.12 µg/mL. However, the difference was not statistically significant. The serum P concentration in the lame cows (4.56±0.24 mg/dL) was significantly different from that in the controls (5.35±0.16 mg/dL). The mean Zn concentration was significantly lower one in the cows with lameness (57.81±3.8 µg/dL) compared with the control cows (85.51±6.01 µg/dL). These results suggest that there is a possible interaction between lameness, fertility, and serum P and Zn concentrations in dairy cows.
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