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Abstract

The objective of this study was to investigate whether health, survival, and performance of dairy heifers from birth through first lactation are associated with parity and health status of their dams. Holstein heifers (n=1,811) derived from artificial insemination were categorized as (1) daughters...

Author(s)
Carvalho, M. R.; Aboujaoude, C.; Peñagaricano, F.; Santos, J. E. P.; Devries, T. J.; McBride, B. W.; Ribeiro, E. S.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2020, 103, 1, pp 823-839
Abstract

Our objective in this study was to evaluate the reproductive performance of dairy heifers and cows inseminated with fresh or frozen sex-sorted semen (SS) in seasonal-calving pasture-based dairy herds. Ejaculates of 10 Holstein-Friesian bulls were split and processed to provide (1) fresh...

Author(s)
Maicas, C.; Hutchinson, I. A.; Kenneally, J.; Grant, J.; Cromie, A. R.; Lonergan, P.; Butler, S. T.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 11, pp 10530-10542
Abstract

The reproductive parameters of dairy cattle have continuously declined worldwide over the last 50 years. Nutritional imbalances are identified as risk factors for this decrease of reproductive performance. The present paper aims to quantify the decrease in the pregnancy per artificial insemination...

Author(s)
Albaaj, A.; Jattiot, M.; Manciaux, L.; Saille, S.; Julien, C.; Foucras, G.; Raboisson, D.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 9, pp 8527-8536
Abstract

Genetic selection of dairy cattle in the United States has included reproductive traits (daughter pregnancy rate, DPR; heifer conception rate, HCR), which is believed to have partly contributed to halting the decline in reproductive performance. The objectives of the current study were to evaluate...

Author(s)
Veronese, A.; Marques, O.; Moreira, R.; Belli, A. L.; Bisinotto, R. S.; Bilby, T. R.; Peñagaricano, F.; Chebel, R. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 7, pp 6624-6638
Abstract

Dairy farming is an emerging enterprise in the semi-arid parts of Eastern Kenya and is constrained by inadequate feeding, poor heat detection methods, unreliable and expensive artificial insemination services, high incidence of infectious diseases among others. A cross-sectional study to establish...

Author(s)
Mungube, E. O.; Njarui, D. M. G.; Maichomo, M. W.; Olum, M. O.; Ndirangu, P. N.; Kabirizi, J.; Ndikumana, J.; Mwangi, G.
Publisher
CIPAV Foundation, Cali, Colombia
Citation
Livestock Research for Rural Development, 2019, 31, 6, pp Article 88
Abstract

Our objective was to compare the insemination dynamics and time to pregnancy for up to 100 d after the beginning of the artificial insemination period (AIP) for heifers managed with first artificial insemination (AI) service programs that relied primarily on insemination at detected estrus (AIE)...

Author(s)
Masello, M.; Perez, M. M.; Granados, G. E.; Stangaferro, M. L.; Ceglowski, B.; Thomas, M. J.; Giordano, J. O.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 2, pp 1671-1681
Abstract

Fusion failure of the Müllerian ducts is thought to occur congenitally in cattle. We aimed to elucidate the contribution of incomplete fusion of the Müllerian ducts to reproductive difficulties in dairy cattle. We observed the vaginas of Holstein cattle to classify the anomalies into mild and...

Author(s)
Ishiyama, D.; Nakamura, Y.; Tanaka, T.; Magata, F.; Matsuda, F.; Maeda, K.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 123, pp 209-215
Abstract

The objective was to determine associations between behavior during head-lock restraint and reproductive performance in dairy heifers. Behavior of 817 Holstein heifers from four farms was evaluated at feeding (Days 0 and 7) while restrained in a self-locking stanchion. All heifers were assigned a...

Author(s)
Kasimanickam, V. R.; Staker, C.; Williams, H. M.; Kastelic, J. P.; Kasimanickam, R. K.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 121, pp 147-152
Abstract

Twenty two multiparous and primiparous Holstein cows were utilized in a completely randomized design to determine the effects of feeding diets containing linseed or cotton seed as sources of n-3 or n-6 FAs on milk production, uterine health, immunity, reproductive responses of heat stressed cows...

Author(s)
El-Garhi, M. S.; Fadel, M. S.; Mahmoud, M. B.; Mansour, A. M.
Publisher
Faculty of Veterinary Medicine, Assiut University, Assiut, Egypt
Citation
Assiut Veterinary Medical Journal, 2018, 64, 156, pp 18-25
Abstract

The article presents the results of studies to assess the functioning of breeding plants with a fundamentally different approach to the formation of dairy herd and breeding work with it. The best breeding plants of the Tver region support the formation of the main herd of cows either through import ...

Author(s)
Sudarev, N. P.; Abylkasymov, D.; Abrampalskaya, O. V.; Chargeishvili, S. V.
Publisher
Severo-Kavkazskiy Federal'nyy Nauchnyy Agrarnyy Tsentr, Stavropol, Russia
Citation
Sel'skokhozyaystvennyy Zhurnal, 2018, 11, 3, pp 50-56

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