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Abstract

Our objective was to compare the AI submission rate and pregnancies per artificial insemination (P/AI) at first service of lactating Holstein cows submitted to a Double-Ovsynch protocol and timed artificial insemination (TAI) versus artificial insemination (AI) to a detected estrus after...

Author(s)
Santos, V. G.; Carvalho, P. D.; Maia, C.; Carneiro, B.; Valenza, A.; Fricke, P. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 10, pp 8507-8517
Abstract

Our objective was to evaluate the association between body condition score (BCS) change during the transition period with fertility, non-esterified fatty acids (NEFA) and beta-hydroxybutyrate (BHBA) concentrations, milk yield, and health problems of Holstein cows in a retrospective cohort study....

Author(s)
Barletta, R. V.; Maturana Filho, M.; Carvalho, P. D.; Valle, T. A. del; Netto, A. S.; Rennó, F. P.; Mingoti, R. D.; Gandra, J. R.; Mourão, G. B.; Fricke, P. M.; Sartori, R.; Madureira, E. H.; Wiltbank, M. C.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 104, pp 30-36
Abstract

Incomplete luteal regression after treatment with a single dose of prostaglandin F during an Ovsynch protocol decreases fertility to timed artificial insemination (TAI). To increase the proportion of cows with complete luteal regression and subsequently pregnancy per artificial insemination...

Author(s)
Borchardt, S.; Pohl, A.; Carvalho, P. D.; Fricke, P. M.; Heuwieser, W.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 9, pp 8566-8571
Abstract

The aim of this study was to compare pregnancy per artificial insemination (P/AI) from service sires used on artificial insemination after estrus detection (EAI) or timed artificial insemination (TAI) breedings. Confirmed artificial insemination outcome records from 3 national data centers were...

Author(s)
Batista, E. O. S.; Vieira, L. M.; SáFilho, M. F.; Carvalho, P. D.; Rivera, H.; Cabrera, V.; Wiltbank, M. C.; Baruselli, P. S.; Souza, A. H.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 3, pp 2010-2015
Abstract

Approximately 20 to 30% of cows diagnosed not pregnant 32 d after timed artificial insemination (TAI) lack a corpus luteum (CL), and cows submitted to a resynchronization protocol in the absence of a CL have about 10% fewer pregnancies per AI (P/AI) than cows with a CL. An understanding of luteal...

Author(s)
Ricci, A.; Carvalho, P. D.; Amundson, M. C.; Fricke, P. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 12, pp 9851-9860
Abstract

Our objective was to evaluate the effect of a second PGF treatment (25 mg of dinoprost) or a double dose of PGF (50 mg of dinoprost) during a Resynch protocol on luteal regression and pregnancies per artificial insemination (P/AI) in lactating dairy cows. Lactating Holstein cows (n=1,100) were...

Author(s)
Barletta, R. V.; Carvalho, P. D.; Santos, V. G.; Melo, L. F.; Consentini, C. E.; Netto, A. S.; Fricke, P. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 2, pp 1730-1736
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

Our objective was to evaluate the effects of temporarily decreasing progesterone (P4) after timed artificial insemination (TAI) on embryonic growth in dairy cows. Lactating Holstein cows (n=80) were submitted to a Double-Ovsynch protocol for first TAI and were assigned randomly to receive 12.5 mg...

Author(s)
Carvalho, P. D.; Consentini, C. C.; Weaver, S. R.; Barleta, R. V.; Hernandez, L. L.; Fricke, P. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 4, pp 3233-3242
Abstract

Presynchronization strategies, such as Presynch-Ovsynch and Double-Ovsynch, increase fertility to timed artificial insemination (TAI) compared with Ovsynch alone; however, simpler presynchronization strategies could reduce costs and simplify reproductive management. Lactating Holstein cows (n=601)...

Author(s)
Carvalho, P. D.; Guenther, J. N.; Fuenzalida, M. J.; Amundson, M. C.; Wiltbank, M. C.; Fricke, P. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2014, 97, 10, pp 6305-6315
Abstract

Ovulation to the first GnRH (G1) treatment of the Ovsynch protocol improves synchronization rate and pregnancies per AI (P/AI). Elevated progesterone (P4) concentrations at G1 decrease the ovulatory response by decreasing the magnitude of the GnRH-induced LH surge. Therefore, our objective was to...

Author(s)
Carvalho, P. D.; Wiltbank, M. C.; Fricke, P. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2015, 98, 12, pp 8800-8813

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