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Cattle Boards
Artificial Insemination (AI) for Cattle
Heat detect VS FTAI for 7&7 Protocol
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<blockquote data-quote="Katpau" data-source="post: 1674165" data-attributes="member: 9933"><p>I received a quick response from Mr Thomas. I will quote you from that response.</p><p></p><p>"In general, my suggestion is not to go to the effort of pulling early heats unless there is a concerningly high proportion in heat prior to, say, 36 hours. Ovulation occurs approximately 30 hours after onset of estrus, so when heat activity is occurring that early, there certainly is potential for reduced fertility in those cows that expressed estrus so early. It would be fine to pull those specific cows early for AI 12-18 hours after onset of estrus."</p><p></p><p>He goes on to caution that inseminating too early can also be problem. Since ovulation does not occur until 30 hours after estrus onset, breeding too early might mean the life of the semen is too short. He also said that with this protocol, most cows will show heat in 42-48 hours.</p></blockquote><p></p>
[QUOTE="Katpau, post: 1674165, member: 9933"] I received a quick response from Mr Thomas. I will quote you from that response. "In general, my suggestion is not to go to the effort of pulling early heats unless there is a concerningly high proportion in heat prior to, say, 36 hours. Ovulation occurs approximately 30 hours after onset of estrus, so when heat activity is occurring that early, there certainly is potential for reduced fertility in those cows that expressed estrus so early. It would be fine to pull those specific cows early for AI 12-18 hours after onset of estrus." He goes on to caution that inseminating too early can also be problem. Since ovulation does not occur until 30 hours after estrus onset, breeding too early might mean the life of the semen is too short. He also said that with this protocol, most cows will show heat in 42-48 hours. [/QUOTE]
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Heat detect VS FTAI for 7&7 Protocol
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