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Abstract:
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(En)
Many farmers believe that high producing cows are more difficult to get in calf, and numerous research projects around the world have supported this opinion. However, other researchers have demonstrated no association between milk production and fertility, and concluded that observed differences in fertility are due to management practices, e.g. heat detection. These studies all failed to use an appropriate, standard measure of milk production, and they use a variety of reprodctive statistics, many of whi --p. iv.
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