Possible causes and treatment strategies for the estrus and ovulation disorders in dairy cows

Endo, Natsumi

doi:10.1262/jrd.2021-125

Cited by 8 publications

(8 citation statements)

References 65 publications

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“…However, they emphasized the need to continue the research on a larger scale. Pregnancy after the first AI is reported in 34% [39] to 50% of dairy cows [40]. In our study, if abortion initiated a new lactation, it was 50.00%-the same in both groups.…”

Section: Discussionsupporting

confidence: 56%

Reproduction and Productivity in Dairy Cattle after Abortions Both Related and Unrelated to Coxiella burnetii

Ringa-Ošleja,

Antāne,

Lūsis

et al. 2023

Animals

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C. burnetii is a widespread pathogen, causing abortions and reproductive disorders in ruminants. The study aimed to evaluate animal reproductive capacity and productivity after abortion, related and unrelated to C. burnetii. We compared data about the abortion time, the outcome of the animals after an abortion, further reproduction, and productivity for C. burnetii-positive (n = 148) and C. burnetii-negative (n = 149) aborted dairy cows and heifers. C. burnetii-positive animals had a positive serological response or presence of C. burnetii DNA at the time of abortion. C. burnetii-positive animals had a significantly higher number of lactations at the time of abortion. However, in the other indicators, we observed no significant differences between the groups. Comparing indicators of all the aborted animals, we found that if animals started a new lactation after abortion, they had a significantly lower milk yield, lower fat, protein, and somatic cell counts (SCCs) in milk during the standard lactation for both primiparous and multiparous cows compared to herd averages in each group. Lower SCCs can be due to animals with a high SCC being culled earlier. We found an economic disadvantage to aborting, not only because of the loss of offspring, but also because of the high culling rate and lower productivity in both primiparous and multiparous cows.

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Section: Discussionsupporting

confidence: 56%

Reproduction and Productivity in Dairy Cattle after Abortions Both Related and Unrelated to Coxiella burnetii

Ringa-Ošleja,

Antāne,

Lūsis

et al. 2023

Animals

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“…Farmers need to wait for the next estrus cycle (21 days on average) if they fail to detect the estrus, and the increased inputs during cows' missed conception will result in the farm incurring economic losses. Therefore, detecting estrus is a crucial management factor affecting the reproductive performance of dairy cows (Dolecheck et al, 2015;Endo, 2022). Historically, cow estrus monitoring was accomplished mainly through manual labor, such as external observations of cow activity and rectal and vaginal examinations.…”

Section: Use Of Estrus Detection Technology In Dairy Cowsmentioning

confidence: 99%

Can the use of digital technology improve the cow milk productivity in large dairy herds? Evidence from China's Shandong Province

Han

Shadbolt

et al. 2022

Front. Sustain. Food Syst.

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IntroductionImproving milk productivity is essential for ensuring sustainable food production. However, the increasing difficulty of supervision and management, which is associated with farm size, is one of the major factors causing the inverse relationship between size and productivity. Digital technology, which has grown in popularity in recent years, can effectively substitute for manual labor and significantly improve farmers' monitoring and management capacities, potentially addressing the inverse relationship.MethodsBased on data from a survey of farms in Shandong Province in 2020, this paper employs a two-stage least squares regression model to estimate the impact of herd size on dairy cow productivity and investigate how the adoption of digital technology has altered the impact of herd size on dairy cow productivity.ResultsAccording to the findings, there is a significant and negative impact of herd size on milk productivity for China's dairy farms. By accurately monitoring and identifying the time of estrus, coupled with timely insemination, digital technology can mitigate the negative impact of herd size on milk productivity per cow.DiscussionTo increase dairy cow productivity in China, the government should promote both small-scale dairy farming and focus on enhancing management capacities of farm operators, as well as large-scale dairy farms and increase the adoption of digital technologies.

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“…In connection with the foregoing, the aim of the work was to study the dynamics of biochemical, hormonal and oxidative parameters in the blood of cattle from the point of view of nonspecific resistance of animals under the action of technological stress [11][12][13][14][15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Dynamics of hematological and oxidative parameters characterizing the nonspecific resistance of cows under technological stress

Deryugina,

Ivashchenko,

Danilova

et al. 2024

BIO Web Conf.

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The aim of the work was to study the dynamics of biochemical, hormonal and oxidative parameters in the blood of cattle from the point of view of nonspecific resistance of animals under the action of technological stress. Technological stress was accompanied by the entry of cortisol into the blood, a significant intensification of lipid peroxidation processes, a decrease in the activity of the antioxidant system of the blood, and a change in the nonspecific resistance of the animal organism. On day 1 after technological stress, the content of cortisol and the level of DC in the blood increased by 2 times, an increase in MDA and OR, a decrease in catalase and reduced glutathione were observed. The most pronounced changes were recorded on days 3-14 after technological stress. The animals showed neutrophilia, monocytosis, lymphopenia and appearance of NEToses on days 3 and 14 after technological stress. On the 3rd day after technological stress, an increase in lysozyme activity of blood serum and a decrease in bactericidal activity were shown. Preservation of reduced indicators of reduced glutathione and lysozyme activity while maintaining cortisol at the upper limit of indicators relative to the initial values was recorded by 30 days in cows after technological stress. The data obtained indicate that the body’s defenses are a dynamic physiological indicator, which must be taken into account as a general resistance of the cattle body to stressors in order to prevent the disruption of the body’s adaptive capabilities.

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Possible causes and treatment strategies for the estrus and ovulation disorders in dairy cows

Cited by 8 publications

References 65 publications

Reproduction and Productivity in Dairy Cattle after Abortions Both Related and Unrelated to Coxiella burnetii

Reproduction and Productivity in Dairy Cattle after Abortions Both Related and Unrelated to Coxiella burnetii

Can the use of digital technology improve the cow milk productivity in large dairy herds? Evidence from China's Shandong Province

Dynamics of hematological and oxidative parameters characterizing the nonspecific resistance of cows under technological stress

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