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Cattle Boards
Breeding / Calving Issues
Birthweights,winter 2011-2012
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<blockquote data-quote="whitecow" data-source="post: 904810" data-attributes="member: 8638"><p>We have seen a difference in birthweights this year compared to last year, but just the opposite of your observation. Our birthweights have been about 8-10 lbs heavier than last year with the exact same matings. My theory is that these calves were conceived and began gestation during our excessive draught when there was no grass to eat and cows were thin & stressed. I theorize that because of the lack of available nutrients, the cow/placenta overdeveloped vasculature and nutrient transport capabilities. When our heavily fertilized and rained on winter pasture kicked in there was a massive increase in nutrient availability in a uterine/placental environment that had already overcompensated. Thus, heavier calves.</p><p></p><p>I have a lot of anecdotal evidence of this same phenomenom from my day job in bovine reproduction.</p></blockquote><p></p>
[QUOTE="whitecow, post: 904810, member: 8638"] We have seen a difference in birthweights this year compared to last year, but just the opposite of your observation. Our birthweights have been about 8-10 lbs heavier than last year with the exact same matings. My theory is that these calves were conceived and began gestation during our excessive draught when there was no grass to eat and cows were thin & stressed. I theorize that because of the lack of available nutrients, the cow/placenta overdeveloped vasculature and nutrient transport capabilities. When our heavily fertilized and rained on winter pasture kicked in there was a massive increase in nutrient availability in a uterine/placental environment that had already overcompensated. Thus, heavier calves. I have a lot of anecdotal evidence of this same phenomenom from my day job in bovine reproduction. [/QUOTE]
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Birthweights,winter 2011-2012
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