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Animal Science Database

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Abstract

The main objective of the study reported here was to examine the association between pregnancy loss (PL) and previous exposure to clinical or subclinical mastitis before breeding or during gestation in primiparous Holstein cows. A secondary objective was to estimate the cost of clinical mastitis...

Author(s)
Dahl, M. O.; Vries, A. de; Maunsell, F. P.; Galvao, K. N.; Risco, C. A.; Hernandez, J. A.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 11, pp 10142-10150
Abstract

The objective of the current study was to evaluate the effect of GnRH early postpartum on induction of ovulation, uterine health, and fertility in dairy cows. Holstein cows without a corpus luteum (CL) at 17±3 DIM were assigned randomly to receive i.m. GnRH (n=245) at 17±3 and 20±3 DIM or remain as ...

Author(s)
Bittar, J. H. J.; Pinedo, P. J.; Risco, C. A.; Santos, J. E. P.; Thatcher, W. W.; Hencken, K. E.; Croyle, S.; Gobikrushanth, M.; Barbosa, C. C.; Vieira-Neto, A.; Galvão, K. N.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2014, 97, 6, pp 3558-3569
Abstract

The objectives of this experiment were to determine the effects of oral Ca supplementation on milk yield, body condition, pregnancy per artificial insemination (P/AI), and days to pregnancy in Holstein cows considered to be of low (LRM; no calving assistance, live singleton without retained...

Author(s)
Martinez, N.; Sinedino, L. D. P.; Bisinotto, R. S.; Daetz, R.; Risco, C. A.; Galvão, K. N.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 10, pp 8417-8430
Abstract

The objective was to decrease the reinsemination interval (RI) when dairy cows and heifers are inseminated using all timed artificial insemination (TAI) programs. Holstein cows (n=211) and heifers (n=153) were randomly assigned to a control or 21-day Resynch (21dRES) at 13 days after TAI. Animals...

Author(s)
Kelley, D. E.; Ibarbia, L.; Daetz, R.; Bittar, J. H.; Risco, C. A.; Santos, J. E. P.; Ribeiro, E. S.; Galvão, K. N.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 85, 2, pp 230-237
Abstract

The objectives of this study were to assess the risk factors for metritis, its effects on milk yield and on reproductive performance, and the efficacy of ceftiofur therapy in Holstein dairy cows. Cows (n=303) from a commercial dairy herd in Argentina were studied. Cows were scored for body...

Author(s)
Giuliodori, M. J.; Magnasco, R. P.; Becu-Villalobos, D.; Lacau-Mengido, I. M.; Risco, C. A.; Sota, R. L. de la
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 6, pp 3621-3631
Abstract

Holstein cows received, subcutaneously 1 (1DESL, n=15) or 2 (2DESL, n=12) degradable implant containing 2.1 mg of the GnRH agonist Deslorelin or no implant (CON, n=18) within 1.5 days postpartum (dpp). Previous pregnant (PPH) and non-pregnant (PNPH) uterine horns were determined by palpation per...

Author(s)
Silvestre, F. T.; Risco, C. A.; Lopez, M.; Sá, M. J. S. de; Bilby, T. R.; Thatcher, W. W.
Publisher
Elsevier, Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2009, 116, 3/4, pp 196-212
Abstract

The objectives were to determine the effects of one or three timed artificial insemination (AI) before natural service (NS) in lactating dairy cows not observed for detection of estrus on hazard of pregnancy, days nonpregnant, and 21-days cycle pregnancy rate. A total of 1050 lactating Holstein...

Author(s)
Lima, F. S.; Bisinotto, R. S.; Ribeiro, E. S.; Ayres, H.; Greco, L. F.; Galvão, K. N.; Risco, C. A.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2012, 77, 9, pp 1918-1927
Abstract

Two experiments evaluated the effects of the first GnRH injection of the 5-d timed artificial insemination (AI) program on ovarian responses and pregnancy per AI (P/AI), and the effect of timing of the final GnRH to induce ovulation relative to AI on P/AI. In experiment 1, 605 Holstein heifers were ...

Author(s)
Lima, F. S.; Ayres, H.; Favoreto, M. G.; Bisinotto, R. S.; Greco, L. F.; Ribeiro, E. S.; Baruselli, P. S.; Risco, C. A.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2011, 94, 10, pp 4997-5004
Abstract

Objectives were to investigate 2 intervals from induction of ovulation to artificial insemination (AI) and the effect of supplemental progesterone for resynchronization on fertility of lactating dairy cows subjected to a 5-d timed AI program. In experiment 1, 1,227 Holstein cows had their estrous...

Author(s)
Bisinotto, R. S.; Ribeiro, E. S.; Martins, L. T.; Marsola, R. S.; Greco, L. F.; Favoreto, M. G.; Risco, C. A.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2010, 93, 12, pp 5798-5808

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