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Abstract

Using a 5-d controlled internal drug-release (CIDR)-Cosynch resynchronization protocol, the objective of this study was to determine the effect of the initial GnRH injection on pregnancy per artificial insemination (P/AI) to the second artificial insemination in lactating Holstein dairy cows. On...

Author(s)
Spencer, J. A.; Carnahan, K.; Shafii, B.; Price, W. J.; Dalton, J.; Ahmadzadeh, A.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 9, pp 8524-8531
Abstract

The objective of this study was to evaluate the economic performance of dairy cows managed with a voluntary waiting period (VWP) of 60 or 88 d. A secondary objective was estimating variation in cash flow under different input pricing scenarios through stochastic Monte Carlo simulations. Lactating...

Author(s)
Stangaferro, M. L.; Wijma, R.; Masello, M.; Thomas, M. J.; Giordano, J. O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 8, pp 7500-7516
Abstract

The objective of this experiment was to evaluate the reproductive performance and herd exit dynamics of dairy cows managed for first service with programs varying in method of submission for insemination and voluntary waiting period (VWP) duration. Holstein cows from a commercial farm in New York...

Author(s)
Stangaferro, M. L.; Wijma, R.; Masello, M.; Giordano, J. O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 2, pp 1673-1686
Abstract

This experiment evaluated the reproductive performance, herd exit dynamics, and lactation performance of dairy cows managed with a voluntary waiting period (VWP) of 60 or 88 d. Secondary objectives were evaluating VWP effect on cyclicity status, uterine health, systemic inflammation, and body...

Author(s)
Stangaferro, M. L.; Wijma, R.; Masello, M.; Thomas, M. J.; Giordano, J. O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 1, pp 717-735
Abstract

There are multiple reasons for reduced fertility in lactating dairy cows. We hypothesized that one cause of reduced fertility could be the overall size of the reproductive tract, particularly the uterus, given well-established uterine functions in many aspects of the reproductive process. Thus, the ...

Author(s)
Baez, G. M.; Barletta, R. V.; Guenther, J. N.; Gaska, J. M.; Wiltbank, M. C.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 85, 8, pp 1357-1366
Abstract

The somatotropic axis is a key metabolic pathway during transition from late pregnancy to early lactation in dairy cows. The first objective of this study was to determine the feasibility of selecting cows with persistent differences in total insulin-like growth factor 1 (IGF-1) concentration by...

Author(s)
Piechotta, M.; Kedves, K.; Araujo, M. G.; Hoeflich, A.; Metzger, F.; Heppelmann, M.; Muscher-Banse, A.; Wrenzycki, C.; Pfarrer, C.; Schuberth, H. J.; Hoedemaker, M.; Bollwein, H.; Kaske, M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 6, pp 3737-3749
Abstract

A total of 304,001 artificial insemination outcomes in up to 7 lactations from 142,389 Holstein cows, daughters of 5,349 sires and 101,433 dams, calving between January 1995 and December 2007 in 1,347 herds were studied by a reaction norm model. The (co)variance components for days to first service ...

Author(s)
Menendez-Buxadera, A.; Carabaño, M. J.; Gonzalez-Recio, O.; Cue, R. I.; Ugarte, E.; Alenda, R.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 7, pp 4653-4665
Abstract

Detection of estrus in dairy cattle is effectively aided by electronic activity tags or pedometers. Characterization of estrus intensity and duration is also possible from activity data. This study aimed to develop an algorithm to detect and characterize behavioral estrus from hourly recorded...

Author(s)
Løvendahl, P.; Chagunda, M. G. G.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2010, 93, 1, pp 249-259
Abstract

ALLAIRE, F. R. Another approach to the regression of yield on a contemporary yield average: 925-926.
ANDRUS, D. F., and FREEMAN, A. E. Age distribution, life expectancy, and culling practices in Iowa dairy herds: 939-940.
ARAVE, C. W., and LAMB, R. C. Effect of blood antigen, serum and milk protein ...

Citation
Journal of Dairy Science, 1969, 52, pp 879-948
Abstract

ALLAIRE, F. R. Probabilities arising from dairy sire evaluation models: 958-959.
ATKESON, G. W., MEADOWS, C. E., and McGILLIARD, L. D. Weighting components of type in classifying Holsteins: 977.
AULETTA, F. J., and BLACK, D. L. Effect of oxytocin and central nervous system stimulants on the bovine...

Citation
Journal of Dairy Science, 1968, 51, pp 925-990

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