Resynchronisation as an element of improving cattle reproduction efficiency

Jaśkowski, J. M.; Gehrke, M.; Herudzińska, Magdalena; Jaśkowski, Bartłomiej M.; Brüssow, Klaus‐Peter

doi:10.2478/jvetres-2019-0009

Cited by 3 publications

(3 citation statements)

References 49 publications

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“…Although cows that exhibit heat symptoms without prior exogenous hormonal stimulation have a higher pregnancy rate than cows that have undergone a different estrus synchronization protocol, the time between parturition and the next pregnancy (open days) is significantly longer in their case than in cows that have undergone TAI. In almost all estrus resynchronization programs, prostaglandin F (PGF) and GnRH analog (GnRH) injections at the appropriate timing and dose are used [30,31]. In the current study, we use the PMSG for the first time instead of GnRH in Ovsynch and try to figure out if this would be significant in the improvement of conception rate and reproductive performance in Holstein dairy cows.…”

Section: Discussionmentioning

confidence: 99%

The Impact of Different Estrus Synchronization Programs on Postpartum Holstein Dairy Cow Reproductive Performance

Hussien

Sharawy

Lenis

et al. 2021

Mansoura Veterinary Medical Journal

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The purpose of this study was to see how the Ovsynch, modified Ovsynch, presynch, and modified presynch protocols affected postpartum reproductive performance in dairy cows. Design: Randomized controlled experimental study Animals: The current research involved 412 dairy cows. Procedures: The cows were split into four groups: GnRH was given on day 0, PGF2∝ on day 7, and GnRH on day 9. Group 1: (Ovsynch protocol, n= 117) received GnRH on day 0 and PGF2∝ on day 7. Group 2 (modified Ovsynch, n=113): PMSG on day 0, PGF2 on day 7, and PMSG on day 9. Group 3 (presynch protocol, n=98) got two doses of PGF2 14 days apart, which allowed for a 12-day delay in the start of Ovsynch. Group 4 (modified presynch protocol, n=84) got two PGF2∝ doses 14 days apart, which was 12 days before the start of modified Ovsynch. All of the animals were artificially inseminated 16 hours following their last GnRH or PMSG dose. The ovarian rebound, number of services per conception, days open, and calving interval were the measures for determining reproductive performance for the dairy cows. Results:The main effect of the synchronisation program showed no significance for ovarian rebound (P >0.05). The S/C, days open and calving intervals were decreased significantly (P＜0.05) in the 3rd and 4th groups when compared with the cows that received either GPG or PMSG treatment only. All four groups had a conception rate of 35.04 (41/117), 40.7 (46/113), 44.8 (44/98), and 57.14 (48/84) %, respectively (P＜0.05). Conclusion and clinical relevance:It was investigated that giving two PGF2 injections before Ovsynch, either utilizing GnRH or PMSG methods, improved the reproductive performance of dairy cows. Furthermore, cows given PMSG had a greater conception rate than cows given GnRH.

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Section: Discussionmentioning

confidence: 99%

The Impact of Different Estrus Synchronization Programs on Postpartum Holstein Dairy Cow Reproductive Performance

Hussien

Sharawy

Lenis

et al. 2021

Mansoura Veterinary Medical Journal

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“…It has been established that the embryo quantity and quality obtained are due to the large variability in ovarian follicular response (from 0 to 50 ovulations per donor), the basis of which is the large population of antral follicles in donor cows ovaries during the induce of their growth by exogenous gonadotropins. In addition, the efficacy of induced superovulation is related to the age and animals individual ability, feeding and keeping conditions, the intensity of exchange processes in their body, lactation stage and hormonal status, period of year, stress, nature of parturition and postpartum periods, with gonadotrophin preparation type, its biological activity, batch and total dose, duration and timing of treatment, and the use of additional hormones in the superovulatory scheme [1,2,3,4,5,6].…”

Section: Introductionmentioning

confidence: 99%

Biologically Active Preparations Use in the Scheme for Stimulating PMSG «folligon» Superovulation in Donor Cows

Verheles¹,

Зайцев²,

Latushko³

et al. 2021

grail-of-science

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The purpose of scientific research was to study the effect of the developed biologically active drug «Stimulin» on the level of superovulatory treatment with PMSG «Folligon» and the quantitative yield of the number of transferable embryos. The experiments were conducted on donor cows of the Ukrainian Black-and-White breed. Experimental donor cows were intramuscular administration injected for 8, 9, 10, 11 days of the oestrous cycle by drug «Stimulin» in a single dose 20 ml. Control animals in these days were similarly administered 20 ml of physiological saline solution. It was established that, when gonadotropin PMSG “Folligon” of a polyovulatory reaction in donor cows, receiving an intramuscular administration of the drug "Stimulin" dose of 20 ml from day 8 to 11 after estrus , promotes a positive trend until its level and the number of embryos suitable for transplantation increase (by 28,5 %), and also reduces neovulated follicles by 27,5%. With induction of gonadotrophin PMSG“Folligon” by superovulation in donor cows, receiving an intramuscular administration from day 8 to day 11 after estrus of the drug "Stimulin", contributes to the tendency to increase the level of superovulation and the number of transferable embryos and reduces the number of non-ovulated follicles.

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“…The combined effect of consecutive AI treatments and the utilization of ultrasound is a reliable tool for reducing the days open, and consequently the intercalving period, increasing the reproductive efficiency of the herd in both pluriparous buffaloes [12] and heifers [13]. In fact, the possibility of utilizing some resynchronization protocols in non-pregnant buffaloes allows to reduce the interval between an unsuccessful AI and the subsequent insemination on the same animal [14]. However, one of the main limitations of these schedules is the time required for pregnancy detection, that can be hardly performed before 25 days post-mating [15].…”

Section: Introductionmentioning

confidence: 99%

Milk Metabolomics Reveals Potential Biomarkers for Early Prediction of Pregnancy in Buffaloes Having Undergone Artificial Insemination

Nicola

Vinale

Salzano

et al. 2020

Animals

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This study aimed to identify potential biomarkers for early pregnancy diagnosis in buffaloes subjected to artificial insemination (AI). The study was carried out on 10 pregnant and 10 non-pregnant buffaloes that were synchronized by Ovsynch-Timed Artificial Insemination Program and have undergone the first AI. Furthermore, milk samples were individually collected ten days before AI (the start of the synchronization treatment), on the day of AI, day 7 and 18 after AI, and were analyzed by LC–MS. Statistical analysis was carried out by using Mass Profile Professional (Agilent Technologies, Santa Clara, CA, USA). Metabolomic analysis revealed the presence of several metabolites differentially expressed between pregnant and non-pregnant buffaloes. Among these, a total of five metabolites were identified by comparison with an online database and a standard compound as acetylcarnitine (3-Acetoxy-4-(trimethylammonio)butanoate), arginine-succinic acid hydrate, 5′-O-{[3-({4-[(3aminopropyl)amino]butyl}amino)propyl]carbamoyl}-2′-deoxyadenosine, N-(1-Hydroxy-2-hexadecanyl)pentadecanamide, and N-[2,3-Bis(dodecyloxy)propyl]-L-lysinamide). Interestingly, acetylcarnitine was dominant in milk samples collected from non-pregnant buffaloes. The results obtained from milk metabolic profile and hierarchical clustering analysis revealed significant differences between pregnant and non-pregnant buffaloes, as well as in the metabolite expression. Overall, the findings indicate the potential of milk metabolomics as a powerful tool to identify biomarkers of early pregnancy in buffalo undergoing AI.

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Resynchronisation as an element of improving cattle reproduction efficiency

Cited by 3 publications

References 49 publications

The Impact of Different Estrus Synchronization Programs on Postpartum Holstein Dairy Cow Reproductive Performance

The Impact of Different Estrus Synchronization Programs on Postpartum Holstein Dairy Cow Reproductive Performance

Biologically Active Preparations Use in the Scheme for Stimulating PMSG «folligon» Superovulation in Donor Cows

Milk Metabolomics Reveals Potential Biomarkers for Early Prediction of Pregnancy in Buffaloes Having Undergone Artificial Insemination

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