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Abstract

The objective of this study was to determine if there are differences in luteal size (LS), progesterone (P4), and luteal blood flow (LBF) between pregnant and non-pregnant Bos indicus dairy cows during the first three weeks after insemination, and whether these parameters are related to each other. ...

Author(s)
Hassan, M.; Arshad, U.; Bilal, M.; Sattar, A.; Avais, M.; Bollwein, H.; Ahmad, N.
Publisher
Society for Reproduction and Development, Tokyo, Japan
Citation
Journal of Reproduction and Development, 2019, 65, 1, pp 29-36
Abstract

Two experiments were conducted to assess a hormonal strategy developed to reduce animal handling for timed artificial insemination (TAI) with sex-sorted semen. Four-hundred ninety-one (491) suckled beef cows received a progesterone (P4) intravaginal device and 2 mg intramuscular (im) injection of...

Author(s)
Silva, M. A. V.; Santos, C. S.; França, I. G.; Pereira, H. G.; SáFilho, M. F.; Freitas, B. G.; Guerreiro, B. M.; Faquim, A.; Baruselli, P. S.; Torres-Júnior, J. R. S.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2018, 114, pp 159-164
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

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

Two long-term, CIDR-based estrus synchronization protocols were evaluated among Bos indicus-influenced and Bos taurus beef heifers. Treatments were evaluated on the basis of estrous response and pregnancy rate resulting from fixed-time artificial insemination (FTAI), and these outcomes were...

Author(s)
Thomas, J. M.; Locke, J. W. C.; Bishop, B. E.; Abel, J. M.; Ellersieck, M. R.; Yelich, J. V.; Poock, S. E.; Smith, M. F.; Patterson, D. J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 92, pp 190-196
Abstract

The aim of this study was to evaluate luteolysis using three doses of PGF on Day 5 or Day 7 of the estrous cycle in nonlactating Nellore (Bos indicus) cows. Cows (n=323) were assigned within date of estrus (Day 0 of estrous cycle) to receive 12.5, 25.0, or 50.0 mg of PGF on either Day 5 or Day...

Author(s)
Ferraz Junior, M. V. C.; Pires, A. V.; Biehl, M. V.; Santos, M. H.; Polizel, D. M.; Nepomuceno, D. D.; Sartori, R.; Barreto Filho, J. B.; Gonçalves, J. R. S.; Day, M. L.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 86, 5, pp 1268-1274
Abstract

The safety of moxidectin 1% injectable anthelmintic (0.6 mg/kg of body weight, 3 times the recommended dose) was evaluated in 145 reproductively sound, beef cows undergoing oestrous cycle. Five treatment groups received moxidectin 1% injectable at specific times relative to a synchronized oestrus...

Author(s)
Rae, D. O.; Larsen, R. E.; Wang, G. T.
Citation
American Journal of Veterinary Research, 1994, 55, 2, pp 251-253

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