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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

The objectives were to evaluate pregnancy per artificial insemination (AI), days to first AI, and proportion pregnant within 7 d of AI eligibility in dairy heifers subjected to presynchronization compared with dairy heifers not presynchronized. Thirty days before AI eligibility, Holstein heifers...

Author(s)
Claypool, C. K.; Spencer, J. A.; Zoca, S. M.; Shafii, B.; Price, W. J.; Ahmadzadeh, A.; Rimbey, N. R.; Dalton, J. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 12, pp 11730-11735
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 objectives were the determine the effects of presynchronization with PGF 2 days before the 5-d timed artificial insemination (AI) protocol on ovarian responses and pregnancy per AI (P/AI) in dairy heifers. The hypothesis was that PGF would induce responsive heifers to be in proestrus at the ...

Author(s)
Karakaya-Bilen, E.; Ribeiro, E. S.; Bisinotto, R. S.; Gümen, A.; Santos, J. E. P.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2019, 132, pp 138-143
Abstract

Pregnancy-associated glycoproteins (PAGs) and progesterone concentrations were assessed in Holstein heifers 28 days post-insemination, following estrus synchronization with either a double prostaglandin (PG) injection or the ovsynch protocol. Animals between 15 and 20 months of age, with a 3-3.5...

Author(s)
Akkose, M.; Sen, C. C.; Kİrmİt, A.; Korkmaz, O.; Yazlİk, M. O.; Gocen, M.; Kuru, M.; Akçay, E.
Publisher
Facultad de Medicina Veterinaria y Zootecnia, Coyoacan, Mexico
Citation
Veterinaria México OA, 2019, 6, 2, pp unpaginated
Abstract

The use of 4-day CoSynch+Controlled internal drug release (CIDR)+timed artificial insemination (TAI) in dairy heifers has resulted in adequate pregnancy rates compared with the 5-day CoSynch+CIDR+TAI protocol. The objective of this study was to compare follicular growth, timing of ovulation and...

Author(s)
Fishman-Holland, H.; Stoskute, A.; Ferrer, M. S.; Veal, D.; Bittar, J. H. J.; Rollin, E.; Lourenço, J.; Palomares, R. A.
Publisher
Wiley, Oxford, UK
Citation
Veterinary Medicine and Science, 2019, 5, 3, pp 379-389
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

Our objective was to retrospectively compare pregnant versus nonpregnant cattle in terms of vascular and morphometric changes in corpora lutea between d 12 and 20 following timed artificial insemination (TAI). Crossbred (Gir × Holstein) lactating dairy cows (n=136) and heifers (n=111) were bred...

Author(s)
Siqueira, L. G.; Arashiro, E. K.; Ghetti, A. M.; Souza, E. D.; Feres, L. F.; Pfeifer, L. F.; Fonseca, J. F.; Viana, J. H.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 6, pp 5612-5622
AbstractFull Text

In Kazakhstan, as in most developed countries, a transition to the breeding of Holstein and Holsteinized cattle is performed in dairy cattle breeding. It became possible due to the extensive use of imported livestock and seed from getters from different countries. Results of a scientific experiment ...

Author(s)
Babich, E. A.; Kikebayev, N. A.; Raketsky, V. A.; Baisakalov, A. A.
Publisher
Agri Bio Research Publishers, Hisar, India
Citation
Annals of Agri Bio Research, 2019, 24, 1, pp 134-138
Abstract

Author(s)
Aswal, A. P. S.
Publisher
Indian Dairy Association, New Delhi, India
Citation
Indian Dairyman, 2019, 71, 6, pp 52-56

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