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Animal Science Database

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Abstract

The objectives of this study were to (1) evaluate factors associated with variation in circulating anti-Müllerian hormone (AMH) concentrations, (2) establish an optimum AMH threshold predictive of pregnancy to first artificial insemination (P/AI), (3) examine the relationship between AMH and...

Author(s)
Gobikrushanth, M.; Purfield, D. C.; Colazo, M. G.; Butler, S. T.; Wang, Z.; Ambrose, D. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 8, pp 7563-7574
Abstract

Two experiments were designed to evaluate the effect of different insemination times (12 and 24 h or 18 and 30 h) and different types of semen (sex-sorted or non-sorted sperm) on embryo production in Nelore (Bos indicus) and Holstein (Bos taurus) superstimulated donors. In the first experiment,...

Author(s)
Soares, J. G.; Martins, C. M.; Carvalho, N. A. T.; Nicacio, A. C.; Abreu-Silva, A. L.; Campos Filho, E. P.; Torres Júnior, J. R. S.; SáFilho, M. F.; Baruselli, P. S.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Animal Reproduction Science, 2011, 127, 3/4, pp 148-153
Abstract

For this study, we used the results of sire fertility (SF) measured on a monthly basis by the ratio between the number of pregnant cows and the number of inseminations, from a total of 905 140 inseminations carried out in Cuba between 1994 and 2003. These artificial inseminations were made using...

Author(s)
Menéndez Buxadera, A.; Ayrado, Y.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Animal, 2013, 7, 5, pp 721-728
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

The objectives of this study were to determine (1) factors associated with serum concentration of insulin-like growth factor-1 (IGF-1); (2) the relationship between serum IGF-1 concentration during the first week postpartum and ovarian cyclicity status by 35 d postpartum (DPP); (3) an optimum serum ...

Author(s)
Gobikrushanth, M.; Purfield, D. C.; Colazo, M. G.; Wang, Z.; Butler, S. T.; Ambrose, D. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2018, 101, 10, pp 9154-9167
Abstract

The acrosome reaction (AR) is a prerequisite for normal sperm fertilizing capability and can be studied in vitro after induction by various agents. The efficacy of a sperm population to undergo the AR in vivo is expected to influence male fertilizing potential. During the past two decades, a number ...

Author(s)
Birck, A.; Christensen, P.; Labouriau, R.; Pedersen, J.; Borchersen, S.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2010, 73, 9, pp 1180-1191
Abstract

The Girolando breed is used in pasture-based dairy production systems in Brazil to associate the high production of Bos taurus to the rusticity and thermal adaptation of Bos indicus. This study was designed to evaluate the physiological response to a gonadotropin-releasing hormone...

Author(s)
Bilego, U. O.; Santos, F. C.; Porto, R. N. G.; Pires, B. C.; Oliveira Filho, B. D.; Viu, M. A. O.; Gambarini, M. L.
Publisher
Springer, Amsterdam, Netherlands
Citation
Tropical Animal Health and Production, 2013, 45, 7, pp 1461-1467
Abstract

This is the very first report that suggests high pregnancy rates can be obtained with use of the Doublesynch protocol in anestrous dairy cows. Recently, a new synchronization method has been developed (Doublesynch) that resulted in synchronized ovulations both after the first and second...

Author(s)
Öztürk, Ö. A.; Cİrİt, Ü.; Baran, A.; Ak, K.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2010, 73, 5, pp 568-576
Abstract

Feet and leg problems have a major effect on the well-being and lifespan of the dairy cow and thus are economically important to the dairy farmer. Apart from approaches using genetic selection for classical traits from conformation scoring, attempts for genetic improvement can be based either on...

Author(s)
Swalve, H. H.; Floren, C.; Wensch-Dorendorf, M.; Schöpke, K.; Pijl, R.; Wimmers, K.; Brenig, B.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2014, 97, 1, pp 507-519
Abstract

The objectives of this study were to derive a useful case definition of delayed resumption of ovarian activity, based on factors associated with reduced fertility, and to assess its impact on subsequent reproductive performance in Holstein cows (Bos taurus). Milk samples were collected twice weekly ...

Author(s)
Gautam, G.; Nakao, T.; Yamada, K.; Yoshida, C.
Publisher
Elsevier Inc., New York, USA
Citation
Theriogenology, 2010, 73, 2, pp 180-189

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