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Animal Science Database

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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

Fertility traits were recently added to the evaluation of genetic merit, allowing for the selection of Holstein cattle with improved reproductive performance. In the current study, we investigated the associations among genomic merit for daughter pregnancy rate (GDPR) and heifer conception rate...

Author(s)
Veronese, A.; Marques, O.; Peñagaricano, F.; Bisinotto, R. S.; Pohler, K. G.; Bilby, T. R.; Chebel, R. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 7, pp 6639-6648
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
Abstract

This study aimed to evaluate the effect of repeated intravenous lipopolysaccharide (LPS) infusions in nonlactating heifers on (1) the systemic proinflammatory state as measured by biomarkers in blood and plasma, and (2) endometrial gene expression of candidate transcripts on d 15 of gestation. Our...

Author(s)
Fernandes, A. C. C.; Davoodi, S.; Kaur, M.; Veira, D.; Melo, L. E. H.; Cerri, R. L. A.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 4, pp 3531-3543
Abstract

Our objective was to assess the effect of treatment with human chorionic gonadotropin (hCG) 7 d after artificial insemination (AI) or at the time of in vitro-fertilized (IVF) embryo transfer on reproductive outcomes, including progesterone (P4), interferon-tau stimulated gene 15 (ISG15),...

Author(s)
Niles, A. M.; Fricke, H. P.; Carvalho, P. D.; Wiltbank, M. C.; Hernandez, L. L.; Fricke, P. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 3, pp 2593-2606
Abstract

To determine the effects of repeated trace mineral injections on heifer development and reproductive performance, commercial Angus heifers (n=290; 199±34.3 kg; 221±22 d of age) were utilized in a completely randomized design. Heifers were stratified by body weight (BW) and were administered an...

Author(s)
Stokes, R. S.; Volk, M. J.; Ireland, F. A.; Gunn, P. J.; Shike, D. W.
Publisher
Oxford University Press, Cary, USA
Citation
Journal of Animal Science, 2018, 96, 9, pp 3943-3954
Abstract

In an effort to better understand the consequences of early weaning (EW) for replacement beef heifers, a two-phase experiment was conducted investigating the impact on metabolic function and documenting reproductive characteristics. In phase 1, Angus × Simmental heifers (n=35) were stratified by BW ...

Author(s)
Zezeski, A. L.; McCracken, V. L.; Poole, R. K.; Al-Naib, A.; Smith, J. K.; McCann, M. A.; Rhoads, M. L.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Animal, 2017, 11, 5, pp 820-825
Abstract

Interferon-tau (IFNτ) is the conceptus derived specific early pregnancy signal in bovidae. Locally, IFNτ induces an IFNτ specific gene expression (ISG) in endometrial cells and by this it averts luteolysis of the corpus luteum (CL) by suppressing prostaglandin production. Moreover, it was shown...

Author(s)
Ruhmann, B.; Giller, K.; Hankele, A. K.; Ulbrich, S. E.; Schmicke, M.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 104, pp 198-204
Abstract

Chemical pregnancy testing is an alternative to traditional methods of pregnancy diagnosis (either manual palpation or ultrasound) in postpartum dairy cows and heifers. The objective was to validate a chemical pregnancy test that confers the advantages of using whole blood, rapid incubation times,...

Author(s)
Mayo, L. M.; Moore, S. G.; Poock, S. E.; Silvia, W. J.; Lucy, M. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 9, pp 7634-7641
Abstract

Effects of phytoestrogen isoflavones in Berseem clover on hormonal balance during early pregnancy and fertility of heifers were studied. Holstein heifers (n=26) were divided into two equal homogenous groups. Heifers in the first group (Clover-fed group) were fed Egyptian clover (Trifolium...

Author(s)
Hashem, N. M.; El-Azrak, K. M.; Sallam, S. M. A.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2016, 170, pp 121-127

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