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Cattle Boards
Artificial Insemination (AI) for Cattle
IVF flushing a virgin heifer ?
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<blockquote data-quote="WalnutCrest" data-source="post: 1267804" data-attributes="member: 21715"><p>Putting a bow on this topic from my perspective ...</p><p></p><p>We aspirated this virgin heifer (injured early in life and stressed throughout) six times. We had a total of 70 oocytes, but only 12 of those converted to embryos. This little lady will be at the butchers within the next 15 days... <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite3" alt=":(" title="Frown :(" loading="lazy" data-shortname=":(" /></p><p></p><p>Of all of the other females we aspirated at the same time as we were aspirating her, we did a total of six other aspirations (two females, three times each) and had a total of 180 oocytes, of which 53 converted to embryos.</p><p></p><p>A conversion rate of approximately 30% is pretty normal for Bos Taurus beef cattle. In our non-injured females, we were at 29.4%. Also, for Bos Taurus cattle, 6-7 embyros per aspiration is pretty typical; we were at 8.8 for our non-injured females.</p><p></p><p>Not sure what others have experienced, as far as productivity, from virgin heifers and/or injured females ... I share this with all of you so that if you're faced with a similar decision this one example might help you make up your mind.</p></blockquote><p></p>
[QUOTE="WalnutCrest, post: 1267804, member: 21715"] Putting a bow on this topic from my perspective ... We aspirated this virgin heifer (injured early in life and stressed throughout) six times. We had a total of 70 oocytes, but only 12 of those converted to embryos. This little lady will be at the butchers within the next 15 days... :( Of all of the other females we aspirated at the same time as we were aspirating her, we did a total of six other aspirations (two females, three times each) and had a total of 180 oocytes, of which 53 converted to embryos. A conversion rate of approximately 30% is pretty normal for Bos Taurus beef cattle. In our non-injured females, we were at 29.4%. Also, for Bos Taurus cattle, 6-7 embyros per aspiration is pretty typical; we were at 8.8 for our non-injured females. Not sure what others have experienced, as far as productivity, from virgin heifers and/or injured females ... I share this with all of you so that if you're faced with a similar decision this one example might help you make up your mind. [/QUOTE]
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IVF flushing a virgin heifer ?
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