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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

This experiment aimed to compare circulating progesterone (P4), follicular dynamics, and fertility during reuse of intravaginal P4 implants that were sanitized by autoclave or chemical disinfection in lactating Holstein cows submitted to fixed-time artificial insemination (FTAI). For this, 123...

Author(s)
Melo, L. F.; Monteiro, P. L. J.; Nascimento, A. B.; Drum, J. N.; Spies, C.; Prata, A. B.; Wiltbank, M. C.; Sartori, R.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 4, pp 3554-3567
Abstract

Two treatments designed to increase circulating progesterone concentration (P4) during preovulatory follicle development were compared. One treatment used 2 intravaginal P4 implants (controlled internal drug-releasing inserts; (CIDR) and the other used a GnRH treatment at beginning of the protocol. ...

Author(s)
Pereira, M. H. C.; Wiltbank, M. C.; Guida, T. G.; Lopes, F. R.; Vasconcelos, J. L. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 10, pp 8455-8470
Abstract

This study evaluated effects of equine chorionic gonadotropin (eCG) on fertility of 679 crossbred (Bos taurus × Bos indicus) lactating grazing cows synchronized for fixed-time AI (FTAI). At a random day of the estrous cycle cows received an intravaginal progesterone (P4) implant, 2 mg estradiol...

Author(s)
Prata, A. B.; Pontes, G. C. S.; Monteiro Júnior, P. L. J.; Drum, J. N.; Wiltbank, M. C.; Sartori, R.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 98, pp 36-40
Abstract

The objectives of this study were to evaluate the effects of daily top-dressing (individually feeding on the top of the total mixed ration) with rumen-protected methionine (RPM) from 30±3 until 126±3 Days in milk on productive and reproductive performance in lactating dairy cows. A total of 309...

Author(s)
Toledo, M. Z.; Baez, G. M.; Garcia-Guerra, A.; Lobos, N. E.; Guenther, J. N.; Trevisol, E.; Luchini, D.; Shaver, R. D.; Wiltbank, M. C.
Publisher
Public Library of Sciences (PLoS), San Francisco, USA
Citation
PLoS ONE, 2017, 12, 12, pp e0189117
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

Our objectives were to evaluate ovarian dynamics and fertility comparing 2 treatments at the start of a progesterone (P4)-based fixed-time artificial insemination (FTAI) protocol and 2 treatments at the end of the protocol. Thus, 1,035 lactating Holstein cows were assigned in a random phase of the...

Author(s)
Melo, L. F.; Monteiro, P. L. J., Jr.; Surjus, R. S.; Drum, J. N.; Wiltbank, M. C.; Sartori, R.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 11, pp 9227-9237
Abstract

There are multiple reasons for reduced fertility in lactating dairy cows. We hypothesized that one cause of reduced fertility could be the overall size of the reproductive tract, particularly the uterus, given well-established uterine functions in many aspects of the reproductive process. Thus, the ...

Author(s)
Baez, G. M.; Barletta, R. V.; Guenther, J. N.; Gaska, J. M.; Wiltbank, M. C.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 85, 8, pp 1357-1366
Abstract

The objective was to evaluate if expression of estrus by dairy cattle altered fertility in timed artificial insemination (AI; n=5,430) or timed embryo transfer (ET; n=2,003) programs that used estradiol and progesterone (P4) to synchronize ovulation. Ovarian ultrasonography was performed on d 0...

Author(s)
Pereira, M. H. C.; Wiltbank, M. C.; Vasconcelos, J. L. M.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 3, pp 2237-2247
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

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