Detection of delayed cyclicity in dairy cows based on progesterone content in monthly milk samples

Petersson, Karl-Johan; Strandberg, E.; Gustafsson, H.; Royal, Melissa; Berglund, B.

doi:10.1016/j.prevetmed.2008.04.001

Cited by 9 publications

(7 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar numbers have also been found in Sweden where the VWP, as reported by the herdsmen, had a mean of 66.5 days with a range between 50 and 80 days [4]. The VWP obviously varies between herds, but may also vary within a herd according to the cow's parity and milk yield [5]. With such variable VWPs, the commonly used reproductive indicators are largely influenced by strategic or managerial decisions along with biological variation and it can be difficult to compare the reproductive efficiency between herds with different management strategies.…”

Section: Introductionsupporting

confidence: 72%

Evaluation of two dairy herd reproductive performance indicators that are adjusted for voluntary waiting period

2012

View full text Add to dashboard Cite

BackgroundOverall reproductive performance of dairy herds is monitored by various indicators. Most of them do not consider all eligible animals and do not consider different management strategies at farm level. This problem can be alleviated by measuring the proportion of pregnant cows by specific intervals after their calving date or after a fixed time period, such as the voluntary waiting period. The aim of this study was to evaluate two reproductive performance indicators that consider the voluntary waiting period at the herd. The two indicators were: percentage of pregnant cows in the herd after the voluntary waiting period plus 30 days (PV30) and percentage of inseminated cows in the herd after the voluntary waiting period plus 30 days (IV30). We wanted to assess how PV30 and IV30 perform in a simulation of herds with different reproductive management and physiology and to compare them to indicators of reproductive performance that do not consider the herd voluntary waiting period.MethodsTo evaluate the reproductive indicators we used the SimHerd-program, a stochastic simulation model, and 18 scenarios were simulated. The scenarios were designed by altering the reproductive management efficiency and the status of reproductive physiology of the herd. Logistic regression models, together with receiver operating characteristics (ROC), were used to examine how well the reproductive performance indicators could discriminate between herds of different levels of reproductive management efficiency or reproductive physiology.ResultsThe logistic regression models with the ROC analysis showed that IV30 was the indicator that best discriminated between different levels of management efficiency followed by PV30, calving interval, 200-days not-in calf-rate (NotIC200), in calf rate at100-days (IC100) and a fertility index. For reproductive physiology the ROC analysis showed that the fertility index was the indicator that best discriminated between different levels, followed by PV30, NotIC200, IC100 and the calving interval. IV30 could not discriminate between the two levels.ConclusionPV30 is the single best performance indicator for estimating the level of both herd management efficiency and reproductive physiology followed by NotIC200 and IC100. This indicates that PV30 could be a potential candidate for inclusion in dairy herd improvement schemes.

show abstract

Section: Introductionsupporting

confidence: 72%

Evaluation of two dairy herd reproductive performance indicators that are adjusted for voluntary waiting period

2012

View full text Add to dashboard Cite

show abstract

“…Progesterone analysis in the first monthly collected milk samples could also be used as a management tool. Petersson et al. (2008) showed that four out of five cows with delayed cyclicity could be predicted within 60 days after calving enabling an earlier treatment.…”

Section: New Tools For Genetic Improvement Of Reproductionmentioning

confidence: 99%

Genetic Improvement of Dairy Cow Reproductive Performance

Berglund

2008

Reprod Domestic Animals

View full text Add to dashboard Cite

The welfare of cow along with profitability in production are important issues in sustainable animal breeding programmes. Along with an intense/intensive selection for increased milk yield, reproductive performance has declined in many countries, in part due to an unfavourable genetic relationship. The largely unchanged genetic trend in female fertility and calving traits for Scandinavian Red breeds shows that it is possible to avoid deterioration in these traits if they are properly considered in the breeding programme. Today's breeding is international with a global selection and extensive use of the best bulls. The Nordic countries have traditionally recorded and performed genetic evaluation for a broad range of functional traits including reproduction. In recent years many other countries have also implemented genetic evaluation for these traits. Thus, the relative emphasis of dairy cattle breeding objectives has gradually shifted from production to functional traits such as reproduction. Improved ways of recording traits, e.g. physiological measures, early indicator traits, assisted reproductive techniques and increased knowledge of genes and their regulation may improve the genetic selection strategies and have large impact on present and future genetic evaluation programmes. Extensive data bases with phenotypic recordings of traits for individuals and their pedigree are a prerequisite. Quantitative trait loci have been associated to the reproductive complex. Most important traits, including reproduction traits are regulated by a multitude of genes and environmental factors in a complex relationship, however. Genomic selection might therefore be important in future breeding programmes. Information on single nucleotide polymorphism has already been introduced in the selection programmes of some countries.

show abstract

“…; Petersson et al. , ). Further examination of milk progesterone profiles enabled their categorization into ‘normal’, ‘delayed’, ‘prolonged’ or ‘pathological’ (Opsomer et al.…”

Section: Introductionmentioning

confidence: 97%

“…Commencement of post-partum luteal activity as indicated by milk progesterone (P4) profile (Lamming and Bulmann 1976;Pollott and Coffey 2007) has been adopted as a key physiological event to monitor reproductive performance in dairy herds (Opsomer et al 2000;Berglund 2008) and a convenient objective fertility index for selection of dairy cows (Royal et al 2002;Petersson et al 2006bPetersson et al , 2007. Further examination of milk progesterone profiles enabled their categorization into 'normal ', 'delayed', 'prolonged' or 'pathological' (Opsomer et al 2000;Royal et al 2000;Petersson et al 2006a;Garmo et al 2008Garmo et al , 2009) the characterization about which has been reported for European dairy cows (Friggens et al 2008).…”

Section: Introductionmentioning

confidence: 99%

Husbandry Factors and the Resumption of Luteal Activity in Open and Zero‐Grazed Dairy Cows in Urban and Peri‐Urban Kampala, Uganda

Kanyima

Båge

Owiny

et al. 2014

Reprod Domestic Animals

View full text Add to dashboard Cite

ContentsThe study investigated the influence of selected husbandry factors on interval to resumption of post-partum cyclicity among dairy cows in urban and peri-urban Kampala. A prospective study of 85 day post-partum period of 59 dairy cows in open (n = 38) and zero grazing (n = 21) systems was conducted on 24 farms. Cows of parity 1–6 were recruited starting 15–30 days post-partum. Progesterone (P4) content in milk taken at 10–12 day intervals was analysed using ELISA. The cow P4 profiles were classified into ‘normal’ (< 56 days), ‘delayed’ (> 56 days), ‘ceased’ or ‘prolonged’ (if started < 56 days but with abnormal P4 displays) resumption of luteal activity and tested for association with husbandry and cow factors. Of the 59 cows, luteal activity in 81.4% resumed normally and in 18.6%, delayed. Only 23.7% maintained regular luteal activity, while the others had ceased (10.2%), prolonged (37.3%) or unclear luteal activity (20.3%). There were no differences between open and zero-grazed cows. Milk production was higher (p < 0.05) in zero than open grazing, in urban than peri-urban and in cows fed on brew waste (p < 0.001) compared with mill products and banana peels. Results suggest that luteal activity resumes normally in a majority of cows, although only a minority experienced continued normal cyclicity once ovulation had occurred, in the two farming systems irrespective of feed supplements or water, and that supplementing with brew waste is beneficial for milk production.

show abstract

Detection of delayed cyclicity in dairy cows based on progesterone content in monthly milk samples

Cited by 9 publications

References 20 publications

Evaluation of two dairy herd reproductive performance indicators that are adjusted for voluntary waiting period

Evaluation of two dairy herd reproductive performance indicators that are adjusted for voluntary waiting period

Genetic Improvement of Dairy Cow Reproductive Performance

Husbandry Factors and the Resumption of Luteal Activity in Open and Zero‐Grazed Dairy Cows in Urban and Peri‐Urban Kampala, Uganda

Contact Info

Product

Resources

About