Postpartum acyclicity in suckled beef cows: A review

Yavas, Y.; Walton, J.S.

doi:10.1016/s0093-691x(00)00323-x

Cited by 191 publications

(135 citation statements)

References 308 publications

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“…As lactation progresses, energy balance improves (Berry et al, 2006), leading to more energy available for reproductive function and other bodily functions. The normal period of anoestrus postpartum can be between 25 and 50 days in dairy cows (Opsomer et al, 2000) and up to 60 days in beef cows (Yavas and Walton, 2000). Corroborating results from the present study, Gautam et al (2010) using data from 215 Holstein cows from four herds documented that <65% of cows had resumed cycling before 35 days postpartum.…”

Section: Paritysupporting

confidence: 75%

“…Scientific literature reviews, however, on both dairy and beef cows separately (Yavas and Walton, 2000;Rhodes et al, 2003;Crowe, 2008) suggest that beef cows have a greater incidence of prolonged postpartum anoestrous compared with dairy cows. The longer postpartum anoestrus period in beef cattle has been linked to the suckling effect (Rhodes et al, 2003).…”

Section: Paritymentioning

confidence: 99%

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Risk factors associated with detailed reproductive phenotypes in dairy and beef cows

Carthy

Berry

Fitzgerald

et al. 2014

Animal

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The objective of this study was to identify detailed fertility traits in dairy and beef cattle from transrectal ultrasonography records and quantify the associated risk factors. Data were available on 148 947 ultrasound observations of the reproductive tract from 75 949 cows in 843 Irish dairy and beef herds between March 2008 and October 2012. Traits generated included (1) cycling at time of examination, (2) cystic structures, (3) early ovulation, (4) embryo death and (5) uterine score; the latter was measured on a scale of 1 (good) to 4 (poor) characterising the tone of the uterine wall and fluid present in the uterus. After editing, 72 773 records from 44 415 dairy and beef cows in 643 herds remained. Factors associated with the logit of the probability of a positive outcome for each of the binary fertility traits were determined using generalised estimating equations; linear mixed model analysis was used for the analysis of uterine score. The prevalence of cycling, cystic structures, early ovulation and embryo death was 84.75%, 3.87%, 7.47% and 3.84%, respectively. The occurrence of the uterine heath score of 1, 2, 3 and 4 was 70.63%, 19.75%, 8.36% and 1.26%, respectively. Cows in beef herds had a 0.51 odds (95% CI = 0.41 to 0.63, P < 0.001) of cycling at the time of examination compared with cows in dairy herds; stage of lactation at the time of examination was the same in both herd types. Furthermore, cows in dairy herds had an inferior uterine score (indicating poorer tone and a greater quantity of uterine fluid present) compared with cows in beef herds. The likelihood of cycling at the time of examination increased with parity and stage of lactation, but was reduced in cows that had experienced dystocia in the previous calving. The presence of cystic structures on the ovaries increased with parity and stage of lactation. The likelihood of embryo/foetal death increased with parity and stage of lactation. Dystocia was not associated with the presence of cystic structures or embryo death. Uterine score improved with parity and stage of lactation, while cows that experienced dystocia in the previous calving had an inferior uterine score. Heterosis was the only factor associated with increased likelihood of early ovulation. The fertility traits identified, and the associated risk factors, provide useful information on the reproductive status of dairy and beef cows.

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Section: Paritysupporting

confidence: 75%

Section: Paritymentioning

confidence: 99%

Risk factors associated with detailed reproductive phenotypes in dairy and beef cows

Carthy

Berry

Fitzgerald

et al. 2014

Animal

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“…- E-mail: rungerfeld@gmail.com This problem is greater in primiparous than multiparous cows, as postpartum anestrous is longer in the former (Yavas and Walton, 2000), resulting in lower pregnancy rates if specific strategies are not applied (Arthington and Kalmbacher, 2003). According to Short et al (1990), prolonged suckling, nutritional deficiencies, climatic stress, parity, time of the year and management practices are the main determinants of the long calving interval.…”

Section: Introductionmentioning

confidence: 99%

Behavioral and physiological changes in early-weaned multiparous and primiparous beef cows

Ungerfeld

Hötzel

Scarsi

et al. 2011

Animal

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Early weaning is used to advance postpartum ovulation in beef cows, but triggers a stress response, affecting cows' and calves' welfare. Our aim was to compare the response to early weaning in multiparous and primiparous cows. Seventy-one days after birth, calves from 14 primiparous and 11 multiparous cows were weaned. Since birth, cow's body weight (BW), body condition (BC), milk yield and calves' BW were recorded. Basophil/neutrophil relationship, total protein and albumin concentrations were measured before and after weaning. The distance between each cow and its calf before weaning, as well as main behaviors of the cows before and after weaning were recorded using 10 min scan sampling. BW and BC were greater in multiparous than in primiparous cows ( P , 0.0001 for both). There was an interaction between parity ( P 5 0.004) and gender of the calf ( P 5 0.007): both BW and BC were greater in multiparous than primiparous cows, but multiparous cows with male calves had lower BW and BC than those with females ( P , 0.001 for both variables). Milk yield was greater in multiparous than in primiparous cows ( P 5 0.02), and there was an interaction, with greatest milk yield in multiparous cows that calved males ( P 5 0.02). Total protein blood concentration increased with time ( P , 0.0001), similarly in both groups. Albumin concentration profiles were similar despite parity, and decreased since 10 days after weaning ( P , 0.0001). Basophil/neutrophil ratio was not affected by parity, and increased the day of weaning, remaining high until day 10 ( P , 0.05). Frequency of standing decreased during the 2 days after weaning, with a greater decrease in multiparous than in primiparous cows ( P , 0.0001). Pacing increased after weaning ( P 5 0.001), but increased significantly more in multiparous cows ( P 5 0.006), with a significant time after weaning by parity interaction ( P 5 0.01) reflected in greater frequencies in multiparous cows in the 2 days. Walking increased with time ( P , 0.0001), and was more frequent in primiparous cows ( P 5 0.008). Ruminating, which was less frequent in multiparous cows ( P 5 0.014), decreased and remained low during the 3 days following weaning ( P , 0.0001), but there was a significant time by parity interaction ( P , 0.0001). The frequency of vocalizations increased dramatically after weaning ( P , 0.0001), and was greater in multiparous cows ( P 5 0.006), and decreased more slowly during the 2nd and 3rd days after weaning ( P 5 0.005) in these animals. In conclusion, behavioral changes induced by weaning were greater in multiparous than primiparous cows, indicating a more intense response to cow-calf separation in the multiparous animals.

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“…A determinação de um período restrito de acasalamento para vacas de corte torna a fertilidade pós-parto o fator-chave quando o objetivo é obter de terneiro/vaca/ano, assim o intervalo entre o parto e a concepção para uma vaca ser economicamente viável deve ser de no máximo 82 dias, já que a gestação tem a duração de 283 dias do ano (YAVAS & WALTON, 2000b;PIMENTEL et al, 2005). A redução do período de acasalamento é considerado um dos princípios de manejo mais eficazes para melhorar a fertilidade pós-parto em vacas de corte (SHORT et al, 1990).…”

Section: Com O Objetivo De Caracterizar O Desempenho Produtivo E Reprunclassified

Desempenho reprodutivo de vacas de corte em lactação e solteiras submetidas à indução/sincronização de estro

et al. 2008

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Postpartum acyclicity in suckled beef cows: A review

Cited by 191 publications

References 308 publications

Risk factors associated with detailed reproductive phenotypes in dairy and beef cows

Risk factors associated with detailed reproductive phenotypes in dairy and beef cows

Behavioral and physiological changes in early-weaned multiparous and primiparous beef cows

Desempenho reprodutivo de vacas de corte em lactação e solteiras submetidas à indução/sincronização de estro

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