Prediction of calving date in beef cows by real-time ultrasonic scanning

Wright, IA; White, I R; Russel, AJ; Whyte, T. K.; McBean, AJ

doi:10.1136/vr.123.9.228

Cited by 33 publications

(26 citation statements)

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“…Studies on Holstein cows have shown that calving complications cause reduced reproductive performance, resulting in a longer period between calving and conception (Dematawewa and Berger 1997). Various protocols have been proposed to determine the exact moment during which the calving process begins, including ultrasound monitoring (Wright et al 1988), observing changes in body temperature (Fujomoto et al 1988;Aoki et al 2005), analyzing blood levels of estrone sulfate and 17-ß-estradiol (Shah et al 2007), analyzing blood levels of progesterone (Matsas et al 1992), controlling the level of relaxation of pelvic ligaments (Dufty 1971), and determining the concentration of electrolytes present in mammary gland secretions (Bleul et al 2006). Recently, a proposal was made regarding the use of an electronic system that once attached to the vulva, gets activated by expulsion of fetal membranes, thus, generating a radio-wave frequency that is transmitted to the global system for mobile communications (GSM).…”

Section: Introductionmentioning

confidence: 99%

Improving calving management to further enhance reproductive performance in dairy cattle

et al. 2010

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The aim of this study was to develop a system for the monitoring of calving to both reduce perinatal morta1ity and improve dairy cow fertility by preventing the majority of post-partum reproductive pathologies. Eighty dairy cows were assigned to the protocol of calving monitoring using GSM (Global System for Mobile Communications) technology. The application of GSM technology and the proper management of calving facilities comprise reliable approaches for calving assistance and improvements in reproductive efficiency and neonata1 viability. Based on the results of this study, we advocate the use of GSM technology on large farms for intensive mi1k production.

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Section: Introductionmentioning

confidence: 99%

Improving calving management to further enhance reproductive performance in dairy cattle

et al. 2010

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“…Ultrasonographic fetometry has been shown to provide a precise estimation of gestational age and prediction of calving dates [94]. In a study of 300 pregnant beef cows between 35 and 125 days of gestation, Wright et al [94] reported the mean difference between the actual and predicted calving dates as 0.9 ± 9.0 S.D (days).…”

Section: Ultrasonographic Fetometrymentioning

confidence: 99%

“…Accurate estimate of calving dates could be a good management tool as cows can be rationed more precisely in late pregnancy to achieve the appropriate level of body condition at calving [94]. Management at calving could also be eased if cows could be grouped according to their expected calving dates.…”

Section: Ultrasonographic Fetometrymentioning

confidence: 99%

“…In a study of 300 pregnant beef cows between 35 and 125 days of gestation, Wright et al [94] reported the mean difference between the actual and predicted calving dates as 0.9 ± 9.0 S.D (days). It was concluded that the accuracy and precision of the prediction of calving date were sufficient to be of benefit in the management of cows in late pregnancy and at calving.…”

Section: Ultrasonographic Fetometrymentioning

confidence: 99%

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Bovine Reproductive Ultrasonography: A Review

Ribadu

Nakao

1999

Journal of Reproduction and Development

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Abstract. The advent of ultrasonography over a decade ago has contributed tremendously in the field of bovine reproduction. Ultrasound imaging has shown that cattle exhibit 2 or 3 waves of follicular development during an estrous cycle. Ultrasonography allows monitoring of individual follicles as they grow and/or regress over time and patterns of follicular development can thus be determined with relative precision. Other important applications of ultrasonography in bovine reproduction includes; pregnancy diagnosis, fetal sex determination, folliculocenteses, diagnosis of abnormalities of the reproductive organs, monitoring of treatment of ovarian cysts, monitoring of postpartum genital resumption, ultrasound-guided centesis and male genital ultrasonography. Recent applications of ultrasonography in bovine reproduction includes doppler ultrasonography for genital blood flow and mammary ultrasonography. The use of ultrasonography is indispensable in most studies in which morphology (structure) and function are correlated. In this paper, the literature pertaining to the use of ultrasonography in bovine reproduction is reviewed. The applications and limitations of ultrasonography are highlighted. The non-invasive nature of ultrasonography makes it an excellent clinical and research tool in bovine reproduction.

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“…The organs evaluated included eyeball, metacarpal diaphysis, os ilium and os ischii and scrotum. Ultrasonographic foetometry has been shown to provide a precise estimation of gestational age and prediction of calving dates [40]. This investigation concluded with the assertion that the accuracy and precision of the prediction of calving date were sufficient to be of benefit in the management of cows in late pregnancy and at calving.…”

Section: Figurementioning

confidence: 89%

Advances in ultrasonography and its applications in domestic ruminants and other farm animals reproduction

Medan

El‐Aty

2010

Journal of Advanced Research

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Ultrasound techniques are becoming increasingly important in animal reproduction, offering both a mean of diagnosis and a useful therapeutic tool. Accordingly, understanding the use of ultrasound technology is critical in contemporary animal sciences, since ultrasound examinations are now a routine component of diagnostic workups in reproduction. Ultrasound technology offers the assessment of pregnancy status and foetal viability early post breeding in order to identify animals that fail to conceive, improving reproductive efficiency; early identification of animals carrying twin foetuses, allowing for the implementation of differential management strategies to avoid the negative effects of twinning on general health of the mother animal and also at parturition; and the visualisation of ovarian and uterine pathologies not accurately detected via rectal palpation, allowing appropriate therapies to be implemented. In addition, determination of foetal sex in utero can be done by ultrasonography. The new information that has been generated through ultrasound has thrown light on therapeutic uses, thereby opening up new areas for research. Moreover, ultrasound-guided interventional techniques can be used for diagnostic or therapeutic purposes. In this review, advances and applications of ultrasonography in domestic animal reproduction are reviewed.

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Prediction of calving date in beef cows by real-time ultrasonic scanning

Cited by 33 publications

References 0 publications

Improving calving management to further enhance reproductive performance in dairy cattle

Improving calving management to further enhance reproductive performance in dairy cattle

Bovine Reproductive Ultrasonography: A Review

Advances in ultrasonography and its applications in domestic ruminants and other farm animals reproduction

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