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Cattle Boards
Breeding / Calving Issues
Cystorelin Question
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<blockquote data-quote="Lucky_P" data-source="post: 886603" data-attributes="member: 12607"><p>If you knew the cow had been in heat 7 days or more earlier, there'd be no need for the GnRH. If she's got a CL, it does nothing.</p><p>However, if you're synching a bunch of cows(or even just one) and you don't know when she was last in heat, giving GnRH and inserting the CIDR essentially puts them all at the same 'starting point'.</p><p>Giving GnRH at timed-breeding in a synch protocol just ensures that the cow will ovulate within the next 10 hrs(if she's not already well on her way to doing so) - provided that she's cycling normally.</p></blockquote><p></p>
[QUOTE="Lucky_P, post: 886603, member: 12607"] If you knew the cow had been in heat 7 days or more earlier, there'd be no need for the GnRH. If she's got a CL, it does nothing. However, if you're synching a bunch of cows(or even just one) and you don't know when she was last in heat, giving GnRH and inserting the CIDR essentially puts them all at the same 'starting point'. Giving GnRH at timed-breeding in a synch protocol just ensures that the cow will ovulate within the next 10 hrs(if she's not already well on her way to doing so) - provided that she's cycling normally. [/QUOTE]
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