Evaluation of two beef cow fixed-time AI protocols that utilize presynchronization

Evaluation of two beef cow fixed-time AI protocols that utilize presynchronization

Presynchronization was evaluated as a method to improve estrus response before fixed-time AI (FTAI). The objective was to compare FTAI results in beef cows from two different presynchronization approaches. Blood samples were collected on Day −14 (Day 0 = CIDR removal) to determine progesterone conce...

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Veröffentlicht in:Theriogenology 2024-01, Vol.213, p.59-65
Hauptverfasser: Ketchum, Jaclyn N., Quail, Lacey K., Epperson, Kaitlin M., Guy, Chloey P., Rich, Jerica J.J., Zoca, Saulo Menegatti, Kline, Adalaide C., Andrews, Taylor N., Walker, Julie A., Piza Fontes, Pedro Levy, Johnson, Sandy K., Owen, Megan P.T., Eborn, Douglas, Harvey, Kelsey M., Summers, Adam F., Perry, George A.
Format: Artikel
Sprache:eng
Schlagworte:
beef
Beef cattle
beef cows
blood
blood sampling
body condition
estrus
Fixed-time artificial insemination
herds
periodicity
physiological state
Pregnancy
Presynchronization
progesterone
prostaglandins
Synchronization of ovulation
ultrasonography
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Zusammenfassung:Presynchronization was evaluated as a method to improve estrus response before fixed-time AI (FTAI). The objective was to compare FTAI results in beef cows from two different presynchronization approaches. Blood samples were collected on Day −14 (Day 0 = CIDR removal) to determine progesterone concentration (≥1 ng/mL = high,
ISSN:0093-691X
1879-3231
DOI:10.1016/j.theriogenology.2023.09.017