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Breeding / Calving Issues
AI ? - How long to settle
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<blockquote data-quote="2/B or not 2/B" data-source="post: 886483" data-attributes="member: 7233"><p>We inseminate tomorrow (!). My question is how long does the semen remain viable and what is the time window for settling? We plan to turn out our bull 15 days after AI and preg test them by blood draw 30 days after AI. I'd like to adjust that date based on how long it could take them to settle. In theory, it should tell us which settled to AI vs. natural cover since any bred by the bull at that time wouldn't yet register on the first blood test. </p><p></p><p>A side note: We are using 7-day CoSynch + CIDR and the timeline is slightly different for cows vs. heifers. We've tried to follow everything to the letter, but when it was time to pull the CIDR's from the cows (at 9pm in the freezing dark), one of the cows was missing her CIDR. At the time, I was sure she had lost it and for some reason didn't think to go get a glove and check. We gave her lutalyse anyway and let her go. The next morning, when it was time to work the heifers, we ran her through again and this time I checked thoroughly and found it inside of her. We're going to continue as planned but I kind of screwed that one up didn't I? She got the lute on time but the CIDR was pulled 12 hours late. </p><p></p><p>This has been interesting. Giving the shots and CIDR's is pretty easy. It's the repeated penning and sorting that's a lot of work.</p></blockquote><p></p>
[QUOTE="2/B or not 2/B, post: 886483, member: 7233"] We inseminate tomorrow (!). My question is how long does the semen remain viable and what is the time window for settling? We plan to turn out our bull 15 days after AI and preg test them by blood draw 30 days after AI. I'd like to adjust that date based on how long it could take them to settle. In theory, it should tell us which settled to AI vs. natural cover since any bred by the bull at that time wouldn't yet register on the first blood test. A side note: We are using 7-day CoSynch + CIDR and the timeline is slightly different for cows vs. heifers. We've tried to follow everything to the letter, but when it was time to pull the CIDR's from the cows (at 9pm in the freezing dark), one of the cows was missing her CIDR. At the time, I was sure she had lost it and for some reason didn't think to go get a glove and check. We gave her lutalyse anyway and let her go. The next morning, when it was time to work the heifers, we ran her through again and this time I checked thoroughly and found it inside of her. We're going to continue as planned but I kind of screwed that one up didn't I? She got the lute on time but the CIDR was pulled 12 hours late. This has been interesting. Giving the shots and CIDR's is pretty easy. It's the repeated penning and sorting that's a lot of work. [/QUOTE]
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