Relationships between Body Weight and Milk Yield During the Early Postpartum Period and Bull and Technician and the Reproductive Performance of High Producing Dairy Cows

Santolaria, P.; López‐Gatius, F.; Sánchez-Nadal, J. A.; Yániz, J.L.

doi:10.1262/jrd.2011-035

Cited by 7 publications

(9 citation statements)

References 26 publications

(32 reference statements)

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“…Cows suffering from metritis were randomly allocated to one of the two groups according to the last digit of their ear tag. Thus, cows with an odd number (1,3,5,7,9) were allocated to the P group. In this group, cows only received parenteral amoxicillin by intramuscular route.…”

Section: Experimental Designmentioning

confidence: 99%

“…The reproductive performance of a cow after parturition is affected by many factors such as parity, the number of days without milk production, body weight (BW) loss, heat stress, season at the first artificial insemination (AI), season at conception, bull used for the AI, and the technician who carries out the AI [1]. Moreover, clinical conditions such as clinical ketosis, clinical hypocalcemia, and uterine diseases could negatively affect the future reproductive performance of the cow [2,3].…”

Section: Introductionmentioning

confidence: 99%

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Comparison of two treatment strategies for cows with metritis in high-risk lactating dairy cows

Armengol

Fraile

2015

Theriogenology

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Acute puerperal metritis (APM) and clinical metritis (CM) are uterine diseases frequently diagnosed in dairy cows. These diseases are responsible for important economic loss because of their effect not only on reproductive performance but also on milk production. The objective of this study was to assess the impact of two different treatments for metritis on dairy cows by measuring their reproductive performance in the next gestation. The end points to measure the reproductive performance included the conception rate at the first artificial insemination, the number of days at conception, and the proportion of nonpregnant cows at over 150 days after beginning milk production. The study was carried out in a high production dairy cow farm located in Lleida (northeast Spain). Recordings of 1044 parturitions of 747 Holstein cows were controlled in this farm from 2009 to 2014. Cows were diagnosed as suffering from metritis (APM or CM) if the following parameters were observed: an abnormally enlarged uterus; a fetid, watery, reddish brown uterine discharge with (APM) or without (CM) fever (>39.5 °C); and presence (APM) or absence (CM) of signs of systemic illness (decreased milk production, dullness, or other signs of toxemia) within 21 days postpartum. Afterwards, cows suffering from metritis (APM or CM) were randomly assigned and balanced to two groups: (1) animals receiving parenteral amoxicillin intramuscularly plus intrauterine infusion with oxytetracycline (P + I group) and (2) animals receiving only parenteral amoxicillin intramuscularly (P group). Furthermore, reproductive performance of cows without metritis was used as reference (control group). Metritis was diagnosed in 27.5% of the total parturitions included in the study (288 of 1044). In particular, metritis was diagnosed in 30.5% (118 of 387) and 25.9% (170 of 657) of parturitions from heifers and multiparous cows, respectively. Reproductive performance was not significantly affected by the parity, the season at the first artificial insemination, the season at conception, the bull, or the inseminator. The P + I treatment was able to significantly reduce the number of days at the first insemination and at conception when compared with the P treatment in heifers. In multiparous cows, this significant effect was only observed for days at conception. Additionally, the P + I treatment was able to significantly increase the percentage of pregnant animals at the first insemination and decrease the percentage of nonpregnant cows at greater than 150 days in milk production for both heifers and multiparous cows when compared with the P treatment.

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Section: Experimental Designmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparison of two treatment strategies for cows with metritis in high-risk lactating dairy cows

Armengol

Fraile

2015

Theriogenology

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“…But some authors have associated increases in milk yield with decreases in pregnancy ratio (Santolaria et al, 2012). Roche (2006) stated that high-producing cows have a greater negative energy balance (NEB) and its magnitude is directly related to reproductive failure.…”

Section: Introductionmentioning

confidence: 99%

Analysis of daily body weight of dairy cows in early lactation and associations withproductive and reproductive performance

et al. 2015

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-The objective of this study was to describe daily body weight (BW) changes in the first 100 days of lactation in confined dairy cows and to associate BW loss with productive and reproductive performance. Data included 26,344 daily BW measurements of 372 Holsteins calving between June 2011 and June 2012 in a commercial herd in the South of Brazil. Cows were automatically weighed and were assigned according to parity. Individual measurements were smoothed using cubic splines, generating nadir BW, days to nadir BW and the BW loss (absolute and relative values). This approach used days in milk (DIM) as a single smoothing variable. Body weight at calving differed across parities: 570.5, 653.5, and 699.9 kg, for the 1st, 2nd and 3rd and subsequent parities, respectively. Body weight at nadir also differed across parities: 521.5, 608.8, and 647.3 kg, respectively. Mean days from calving BW to nadir BW and mean loss of BW (kg) from calving to nadir BW did not differ across parities, but relative BW change (kg/100 kg) was larger in animals in first parity (-8.4 kg/100 kg) than second parity (-6.6 kg/100 kg). However, cows in first parity had more chances for good reproduction than cows in third and subsequent parities (44.0% vs. 30.7%, respectively). There was no difference in the probability of adequate reproduction (pregnant until 180 DIM) among cows with low, medium, or high milk yield. Furthermore, cows with low and medium BW loss (below 60 kg of BW change) showed more likelihood to adequate reproduction than cows with high BW loss (above 60 kg of BW): 45.5 and 45.8% vs. 24.4%, respectively. Improvements in fertility of dairy cows should be achieved by minimizing body weight loss in early lactation.

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“…However, this could be considered a confounder because all AITs were required to attend at least one training before practicing AI. Studies have shown that participation in refresher courses can lead to higher AI success rates [13,14,17,18]. Moreover, statistical significance was found between training in PCC Ubay and AI success rate.…”

Section: Resultsmentioning

confidence: 95%

“…This is contrary to the findings of Cembrowics [16] where the number of inseminations did not affect the success of AI. However, a high number of inseminations can be associated with better familiarity of the reproductive system [11] and higher confidence of the technician [17] leading to higher success rates.…”

Section: Resultsmentioning

confidence: 99%

Profile and artificial insemination practices of technicians and the artificial insemination success rates in Leyte, Samar, and Biliran, Philippines (2011-2015)

Ybañez¹,

Ybañez²,

Caindec³

et al. 2017

Vet World

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Background:Artificial insemination (AI) is a reproductive biotechnology that may be influenced by several factors, including the profile of the technicians and the practices used. Assessing technician’s profile and their AI practices can be significant in improving AI success rate.Aim:This study aimed to know the profile and current practices used by AI technicians (AITs), to determine the success rates of AI in water buffaloes in Leyte, Samar, and Biliran from 2011 to 2015, and to evaluate the possible association between the parameters investigated.Materials and Methods:A total of 50 AITs from Leyte, Samar and Biliran, Philippines, were interviewed using a fixed questionnaire about their profile and employed AI practices, and 20,455 AI-related records of the Philippine Carabao Center (PCC) at Visayas State University (VSU), Baybay City, Leyte, were screened and analyzed. AI success rates were determined by retrospective analysis of the gathered data. Statistical analysis was performed between the technician profile and practices and the AI success rates.Results:Results revealed that most of the technicians were male, around 31-40 years old, married, college graduates, working under local government units, had other sources of income, and with 1-5 years of continuous AI practice averaging 51-100 inseminations per year. Most of them attended only one basic training seminar, which was conducted more than 3 years ago in PCC in VSU. AI success rates were recorded highest in 2011 and lowest in 2015. Statistical analyses showed that some technician profile parameters (civil status, average AI per year, and the training center) and several practices (checking of soft cervix, rectal palpation, thawing temperature method, straw cutting method, and semen deposition) might have an influence on the success of AI.Conclusion:This study documents the first report on AIT’s profile and their employed AI practices and the AI success rates in Leyte, Samar, and Biliran, Philippines. Selected profile parameters and AI practices may influence AI success rates. AITs should perform more AI services and revisit the employed practices.

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Relationships between Body Weight and Milk Yield During the Early Postpartum Period and Bull and Technician and the Reproductive Performance of High Producing Dairy Cows

Cited by 7 publications

References 26 publications

Comparison of two treatment strategies for cows with metritis in high-risk lactating dairy cows

Comparison of two treatment strategies for cows with metritis in high-risk lactating dairy cows

Analysis of daily body weight of dairy cows in early lactation and associations withproductive and reproductive performance

Profile and artificial insemination practices of technicians and the artificial insemination success rates in Leyte, Samar, and Biliran, Philippines (2011-2015)

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