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Animal Science Database

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Abstract

This experiment evaluated the effects of postweaning body weight (BW) gain of replacement beef heifers on their reproductive development and productivity as primiparous cows. Seventy-two Angus × Hereford heifers were ranked on day -6 of experiment (17 d after weaning) by age and BW (218±1.6 d of...

Author(s)
Schubach, K. M.; Cooke, R. F.; Brandão, A. P.; Schumaher, T. F.; Pohler, K. G.; Bohnert, D. W.; Marques, R. S.
Publisher
Oxford University Press, Cary, USA
Citation
Journal of Animal Science, 2019, 97, 10, pp 4171-4181
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

Prostaglandin F (PGF) is commonly injected intramuscularly (IM) in female cattle in synchronization protocols. A novel site for administration of PGF that improves beef quality assurance is the ischiorectal fossa (IRF). The objective of this study was to determine whether administration of...

Author(s)
Holland, S. C.; Whittier, W. D.; Clark, S. G.; Hafez, S. A.; Swecker, W. S.
Publisher
Elsevier B.V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2018, 198, pp 11-19
Abstract

Heifers and cows that exhibit estrus before fixed-time AI have increased concentrations of estradiol and greater conception rates compared with those that do not. Our objective was to determine whether small doses of gonadotropin-releasing hormone following controlled internal drug-release insert...

Author(s)
Rich, J. J. J.; Northrop, E. J.; Perkins, S. D.; Perry, G. A.
Publisher
American Registry of Professional Animal Scientists (ARPAS), Champaign, USA
Citation
Professional Animal Scientist, 2018, 34, 6, pp 566-570
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

The objective of this work was to evaluate the effect of two synchronization methods with prostaglandins F2α (PGF2α) on heifers and multiparous cows. Fourty-three Bos indicus cows (white and Red Fulani) were divided into four groups in a two-by-two factorial structure, parity x method of...

Author(s)
Bayemi, P. H.; Leinyuy, I.; Nsongka, M. V.; Webb, E. C.; Nchadji, J. M.; Cavestany, D.; Perera, B. M. A. O.
Publisher
Springer, Amsterdam, Netherlands
Citation
Tropical Animal Health and Production, 2015, 47, 1, pp 159-162
Abstract

It is known that lumpy skin disease virus (LSDV) can be shed in bull semen following infection and also that artificial insemination (AI) poses a biosecurity risk. However, it is not known whether the use of LSDV infected semen in AI poses a biosecurity risk. The aim of this study was to...

Author(s)
Annandale, C. H.; Holm, D. E.; Ebersohn, K.; Venter, E. H.
Publisher
Wiley-Blackwell, Berlin, Germany
Citation
Transboundary and Emerging Diseases, 2014, 61, 5, pp 443-448
Abstract

The objective was to determine the accuracy of a pregnancy test for predicting nonpregnant cattle based on the evaluation of corpus luteum (CL) blood flow at 20 d (CLBF-d20) after timed artificial insemination (TAI). Crossbred Holstein-Gir dairy heifers (n=209) and lactating cows (n=317) were...

Author(s)
Siqueira, L. G. B.; Areas, V. S.; Ghetti, A. M.; Fonseca, J. F.; Palhao, M. P.; Fernandes, C. A. C.; Viana, J. H. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 10, pp 6461-6472
Abstract

The objectives were to determine whether rates of conception, ovulation, presynchronization, or follicle and CL characteristics were altered after modifying the Double-Ovsynch (DO) protocol to include hCG compared with the DO protocol. Primiparous and multiparous lactating dairy cows (N=183), and...

Author(s)
Binversie, J. A.; Pfeiffer, K. E.; Larson, J. E.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2012, 78, 9, pp 2095-2104
Abstract

This study evaluated fertility in swamp buffalo after synchronization of ovulation combined with fixed time artificial insemination. At the start of the study, designated day 0, from a group of 98 female Thai swamp buffalo, 55 buffalo (heifers n°=20 and cows n°=35) were selected to be synchronized...

Author(s)
Chaikhun, T.; Tharasanit, T.; Rattanatep, J.; Rensis, F. de; Techakumphu, M.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2010, 74, 8, pp 1371-1376

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