Postpartum gonadotropin secretion in Holstein-Friesian dairy cows differing genetically in liveweight.


AIM To determine whether there are differences in postpartum gonadotrophic activity between strains of Holstein-Friesian dairy cows genetically selected on mature liveweight that might explain differences between the strains in fertility, and the interval between calving and the resumption of ovarian follicular activity. METHODS Mixed-age Holstein… (More)


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