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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

Improving artificial insemination (AI) pregnancy rates in replacement heifers improves the genetic advancement within a herd. Heifers that have completed at least three estrous cycles prior to breeding have greater pregnancy rates compared to acyclic females. Therefore, it was hypothesized that a...

Author(s)
Monn, R. E.; Poole, R. K.; Mackey, J. C.; Mayberry, K. J.; Dudley, H. B.; Alley, M.; Poole, D. H.
Publisher
Oxford University Press, Oxford, UK
Citation
Translational Animal Science, 2019, 3, 1, pp 456-463
Abstract

Our objectives were to determine the effects of the administration of recombinant bovine somatotropin (bST) at the initiation of a fixed-time AI (TAI) protocol on concentrations of plasma IGF-1, follicle diameter, embryo/fetal size, and pregnancy rates in replacement beef heifers. Four hundred and...

Author(s)
Oosthuizen, N.; Fontes, P. L. P.; Henry, D. D.; Ciriaco, F. M.; Sanford, C. D.; Canal, L. B.; Moraes, G. V. de; DiLorenzo, N.; Currin, J. F.; Clark, S.; Whittier, W. D.; Mercadante, V. R. G.; Lamb, G. C.
Publisher
Oxford University Press, Cary, USA
Citation
Journal of Animal Science, 2018, 96, 5, pp 1894-1902
Abstract

To determine the effects of estrus synchronization (ES) and fixed-time artificial insemination (TAI) on calving distribution in Bos indicus influenced heifers, 751 Bos taurus × Bos indicus beef heifers were enrolled in a completely randomized design at 2 locations from January to May of 2016....

Author(s)
Oosthuizen, N.; Fontes, P. L. P.; Sanford, C. D.; Ciriaco, F. M.; Henry, D. D.; Canal, L. B.; DiLorenzo, N.; Lamb, G. C.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 106, pp 210-213
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

A 14-month-old Japanese Black heifer was evaluated on Day 0 (D 0) for enlargement of the right ovary (RO). Transrectal ultrasonography (TRUS) revealed that the RO was markedly enlarged and multicystic, while the left ovary (LO) was small and inactive. The presumptive diagnosis was granulosa-theca...

Author(s)
Ali, H. E.; Kitahara, G.; Torisu, S.; Nibe, K.; Kaneko, Y.; Hidaka, Y.; Osawa, T.
Publisher
Wiley-Blackwell, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2015, 50, 4, pp 696-703
Abstract

The aim was to characterize changes in the ultrasound characteristics of the CL and uterus in pregnant, inseminated nonpregnant, and cyclic beef heifers and to correlate findings with systemic progesterone (P4) concentrations with the intention of identifying possible markers for early...

Author(s)
Scully, S.; Evans, A. C. O.; Carter, F.; Duffy, P.; Lonergan, P.; Crowe, M. A.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2015, 83, 3, pp 449-458
Abstract

In this study, 53 crossbred beef heifers were used to test the hypotheses that administration of exogenous FSH 2 days following CIDR insertion and administration of estradiol would increase the pregnancy rate in heifers synchronized for FTAI and that plasma leptin concentrations in beef heifers...

Author(s)
Gentry, G. T., Jr.; Gentry, L. R.; Godke, R. A.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Animal Reproduction Science, 2013, 138, 1/2, pp 49-54
Abstract

The aim of this study was to investigate the effects on follicle stimulating hormone (FSH) secretion and dominant follicle (DF) growth, of treatment of Bos indicus heifers with different combinations of intra-vaginal progesterone releasing devices (IPRD), oestradiol benzoate (ODB), PGF and eCG....

Author(s)
Edwards, S. A. A.; Phillips, N. J.; Boe-Hansen, G. B.; Bo, G. A.; Burns, B. M.; Dawson, K.; McGowan, M. R.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Animal Reproduction Science, 2013, 137, 3/4, pp 129-136
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

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