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Abstract

The objective was to evaluate in-line milk progesterone (mP4) data to determine dynamics of pre- and post-insemination mP4 profiles and their associations with parity and outcomes of artificial insemination (AI) in Holstein cows. Milk progesterone (ng/mL) was quantified at pre-determined time...

Author(s)
Bruinjé, T. C.; Gobikrushanth, M.; Colazo, M. G.; Ambrose, D. J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 102, pp 147-153
Abstract

Most dairy cattle populations found in different countries around the world are small to medium sized and use many artificial insemination bulls imported from different foreign countries. The Walloon population in the southern part of Belgium is a good example for such a small-scale population....

Author(s)
Colinet, F. G.; Vandenplas, J.; Vanderick, S.; Hammami, H.; Mota, R. R.; Gillon, A.; Hubin, X.; Bertozzi, C.; Gengler, N.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Animal, 2018, 12, 5, pp 898-905
Abstract

Our objectives were to characterize parameters of luteal activity based on milk progesterone concentration (P4c) data from before and after artificial insemination (AI) and to evaluate their potential association with fertility in Holstein cows. Records of AI events (n=4,353) and of milk P4c...

Author(s)
Bruinjé, T. C.; Colazo, M. G.; Ribeiro, E. S.; Gobikrushanth, M.; Ambrose, D. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 1, pp 780-798
Abstract

The in-line milk analysis system (IMAS) is an automated biosensor technology that samples and quantifies milk progesterone concentrations (P4c) at frequent intervals starting early postpartum until pregnancy. The objective was to validate the use of pregnancy notifications (PregN) generated by an...

Author(s)
Bruinjé, T. C.; Ambrose, D. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 4, pp 3615-3621
Abstract

The aim of this retrospective single-cohort study was to investigate if a rapid change in feeding, management, or housing or an increasing incidence of claw diseases or udder health problems is associated with decreased reproductive performance. Data on individual cows and herds were retrieved from ...

Author(s)
Lomander, H.; Svensson, C.; Hallén-Sandgren, C.; Gustafsson, H.; Frössling, J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 10, pp 6315-6323
Abstract

The aim of the current study was to estimate economic costs of Ostertagia ostertagi and Fasciola hepatica infections in dairy cattle herds in Germany using the online calculation programme Paracalc®. Following a questionnaire, survey data were available from 464 farms in 14 federal states. On those ...

Author(s)
Fanke, J.; Charlier, J.; Steppin, T.; Samson-Himmelstjerna, G. von; Vercruysse, J.; Demeler, J.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Veterinary Parasitology, 2017, 240, pp 39-48
Abstract

Holsteins are the most numerous dairy cattle breed in North America and the breed has undergone intensive selection for improving milk production and conformation. Theoretically, this intensive selection could lead to a reduction of the effective population size and reduced genetic diversity. The...

Author(s)
Yue, X. P.; Dechow, C.; Liu, W. S.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2015, 98, 4, pp 2738-2745
Abstract

We studied how data management affected reproductive performance indicators at herd level and how herd characteristics affected the agreement of the indicators. Data from 483 herds in the Swedish Official Milk Recording Scheme was used. The herd level performance indicators were: number of ...

Author(s)
Löf, E.; Emanuelson, U.; Gustafsson, H.
Publisher
Informa Healthcare, New York, USA
Citation
Acta Agriculturæ Scandinavica. Section A, Animal Science, 2007, 57, 2, pp 73-80
Abstract

In dairy cattle, the widespread use of artificial insemination has resulted in increased selection intensity, which has led to spectacular increase in productivity. However, cow fertility has concomitantly severely declined. It is generally assumed that this reduction is primarily due to the...

Author(s)
Kadri, N. K.; Sahana, G.; Charlier, C.; Iso-Touru, T.; Guldbrandtsen, B.; Karim, L.; Nielsen, U. S.; Panitz, F.; Aamand, G. P.; Schulman, N.; Georges, M.; Vilkki, J.; Lund, M. S.; Druet, T.
Publisher
Public Library of Sciences (PLoS), San Francisco, USA
Citation
PLoS Genetics, 2014, 10, 1, pp 1004049
Abstract

The effect on sperm motility and chromatin integrity of adding homologous or heterologous equine seminal plasma (SP) to fresh stallion spermatozoa selected by single layer centrifugation (SLC) was studied. No statistical difference in mean progressive motility was seen after adding SP at time 0 h,...

Author(s)
Morrell, J. M.; Johannisson, A.
Publisher
Hindawi Publishing Corporation, New York, USA
Citation
Journal of Veterinary Medicine, 2014, No.2014, pp Article ID 325451

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