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Showing 1 to 9 of 9 for “"timed artificial insemination"”.
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Comparison of Luteolysis and Timed Artificial Insemination Pregnancy Rates after Administration of PGF2a in the Muscle or the Ischiorectal Fossa in Cattle
… was performed via ultrasound at 60 days post insemination. Results were analyzed with Proc Glimmix (SAS). Pregnancy rates for neck and IRF injections were 52.6% and 57.2%, respectively (p=0.06). In summary, injection of PGF2α in the IRF for estrus synchronization and lysis of the corpus luteum …
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Synchronization and Resynchronization of Ovulation and Timed Insemination in Lactating Dairy Cows and Heifers
… in synchronization protocols combined with timed artificial insemination (TAI) as related reproductive performance. In the first study, heifers were synchronized with CIDR inserts followed by TAI. Heifers in the estradiol cypionate (ECP) group were synchronized with a combination of ECP, …
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The Interaction of Sire Fertility and Timing of AI in a Synchronization Protocol
… of this study were to determine if fixed-timed artificial insemination (FTAI) at two different times, 0 or 24 h after GnRH administration, in a Presynch-Ovsynch protocol influenced the pregnancy rate (PR) when average and high fertility sires were used. Additionally, a second experiment …
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Methods of fertility enhancement and control of beef females
… was left in situ for 9 days. All females were artificially inseminated approximately 47 hours after implant removal. In the first series of experiments, norgestomet impregnated silicone implants were administered on day 9 or 12 and removed on day 21 after the initial SMB timed artificial …
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Changes in vaginal microbiome of beef cows enrolled in estrous synchronization protocols and its relation to fertility
… pH, were restored to normal values by the day of timed artificial insemination. This important finding suggests that although the vaginal microbiome was disrupted by the use of CIDR, the vaginal microbiome is resilient and capable of restoring its natural conditions without intervention. Finally, …
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The Effect of Copper and Zinc Source on Pre-Weaning Performance of Cows, Health and Performance of Suckling Calves, and Post-Weaning Feedlot Performance, Carcass Composition, and Meat Quality of Calves
… their assigned mineral supplement 30 d prior to timed artificial insemination (AI) in the spring of 2012. Cows were maintained in separate pastures by treatment group and received their treatments via free choice loose mineral. Cows and calves remained on treatment supplementation until weaning …
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Methods to enhance embryo quality and recovery rates in superovulated beef cows
… stimulating hormone twice daily over 4 days and timed artificial insemination performed twice (12 hours apart). A greater proportion of quality grade 1 embryos were recovered from the LP cows compared to the HP cows, which had a greater number of quality grade 3 and 4 (degenerate) embryos. …
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Effect of delaying time of AI based on Estrotect patch status on pregnancy rates of beef heifers and nursing beef cows
… conducted to evaluate the efficacy of a delayed timed AI (TAI) protocol. The objective was to evaluate the use of Estrotect patch status to determine optimum TAI implementation. Experiment 1 was conducted with, 997 cows across 6 locations were administered a 7-d CO-Synch + controlled internal …
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The effects of feeding a negative dietary cation-anion difference diet at two dietary calcium inclusion rates to close up dry cows on the subsequent lactation uterine health and fertility
… likelihood of being pregnant at the first timed artificial insemination. Cows fed HIGH seemed to have an improved uterine environment due to alleviation of oxidative stress, an enhanced immune response to parturition and uterine discharge comparable to cows fed CON. In conclusion, the …