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Abstract

In order to evaluate artificial cooling and timed artificial insemination (TAI) protocol on fertility during summer months, 90 Holstein heifers were randomly and equally assigned to three treatments: (a) control group (S) with visual heat detection and insemination a.m-p.m after heat detection; (b) ...

Author(s)
Correa-Calderón, A.; Leyva, C.; Avendaño, L.; Rivera, F.; Diaz, R.; Alvarez, F. D.; Ardon, F.; Rodriguez, F.
Publisher
Garuda Scientific Publications, Izatnagar, India
Citation
Journal of Applied Animal Research, 2009, 35, 2, pp 109-112
Abstract

The hypotheses of this study were (1) that the administration of 400 IU eCG in a TAI protocol would increase ovarian follicular growth and diameter of the largest follicle (LF), volume of the CL, and produce an earlier rise on serum concentration of progesterone (P4) to ultimately improve P/AI...

Author(s)
Ferreira, R. M.; Ayres, H.; Sales, J. N. S.; Souza, A. H.; Rodrigues, C. A.; Baruselli, P. S.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Animal Reproduction Science, 2013, 140, 1/2, pp 26-33
Abstract

The aim of this study was to compare four methods of estrus resynchronization performed 23 days after timed artificial insemination (TAI) plus estrus observation in Bos indicus cows. Eight hundred fourteen lactating Nelore cows were submitted to TAI and then randomly assigned to one of the five...

Author(s)
Campos, J. T.; Marinho, L. S. R.; Lunardelli, P. A.; Morotti, F.; Seneda, M. M.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2013, 80, 6, pp 619-623
Abstract

The objective of this study was to investigate the effects of eCG and temporary calf removal (TCR) associated with progesterone (P4) treatment on the dynamics of follicular growth, CL size, and P4 concentrations in cyclic (n=36) and anestrous (n=30) Nelore cows. Cyclic (C) and anestrous (A) cows...

Author(s)
Barreiros, T. R. R.; Blaschi, W.; Santos, G. M. G.; Morotti, F.; Andrade, E. R.; Baruselli, P. S.; Seneda, M. M.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2014, 81, 5, pp 651-656
Abstract

The objective of this experiment was to evaluate the effects of replacing eCG with FSH or FSH/LH on the diameter of ovulatory follicles (DOF) and the pregnancy rates (PR) of lactating Bos indicus cows subjected to a synchronization of ovulation protocol and fixed-time artificial insemination (FTAI) ...

Author(s)
Nogueira, É.; Batista, D. S. do N.; Costa Filho, L. C. C. da; Dias, A. M.; Silva, J. C. B.; Ítavo, L. C. V.
Publisher
Sociedade Brasileira de Zootecnia, Viçosa, Brazil
Citation
Revista Brasileira de Zootecnia, 2014, 43, 7, pp 358-362
Abstract

The dairy goat industry is of great economic importance to certain rural areas of the European Union (EU), especially the Mediterranean region. Its sustainability, however, is severely affected by the seasonality of goat reproduction, which leads to fluctuations in the availability of final...

Author(s)
Lopez-Sebastián, A.; Coloma, M. A.; Toledano, A.; Santiago-Moreno, J.
Publisher
Wiley-Blackwell, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2014, 49, s4, pp 22-29
Abstract

Recent work with P-36 demonstrates that the replacement of the last two doses of Follicle-Stimulating Hormone (FSH) with equine chorionic gonadotropin (eCG) increases embryo yields. However, it is unclear if the positive effect of eCG is related to its FSH-like activity, LH-like activity, or both....

Author(s)
Oliveira, A. C. S.; Mattos, M. C. C.; Bastos, M. R.; Trinca, L. A.; Razza, E. M.; Satrapa, R. A.; Sartori, R.; Barros, C. M.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2014, 82, 5, pp 715-719
Abstract

The aim of the study was to check the reproductive efficiency by eCG and temporary weaning use for TAI in multiparous Nellore cows, after previous treatment with intravaginal progesterone and estradiol benzoate (EB). Three hundred and forty three animals were used, presenting BCS average 2.65...

Author(s)
Souza, A. L. B.; Kozicki, L. E.; Pereira, J. F. S.; Segui, M. S.; Weiss, R. R.; Bertol, M. A. F.
Publisher
Universidade Federal do Paraná, UFPR, Palotina, Brazil
Citation
Archives of Veterinary Science, 2015, 20, 1, pp 22-29

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