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Abstract

The objectives were to determine the effect of ovsynch plus postbreeding infusion treatment combined with fixed time AI on pregnancy rate in healthy Holstein cows. A total of 36 cows ageing between three and eight were used. Cows were randomly assigned to one of three treatment groups. Cows (n=12)...

Author(s)
Yİldİz, A.
Publisher
Medwell Online, Faisalabad, Pakistan
Citation
Journal of Animal and Veterinary Advances, 2010, 9, 9, pp 1345-1350
Abstract

Pregnancy per insemination is a major determinant of reproductive efficiency in cattle and is affected by concentrations of progesterone (P4) during early pregnancy. The relationship between pregnancy per artificial insemination (P/AI) and early luteal concentrations of P4, and repeatability of...

Author(s)
Parr, M. H.; Mullen, M. P.; Crowe, M. A.; Roche, J. F.; Lonergan, P.; Evans, A. C. O.; Diskin, M. G.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 5, pp 2390-2396
Abstract

The objective was to decrease the reinsemination interval (RI) when dairy cows and heifers are inseminated using all timed artificial insemination (TAI) programs. Holstein cows (n=211) and heifers (n=153) were randomly assigned to a control or 21-day Resynch (21dRES) at 13 days after TAI. Animals...

Author(s)
Kelley, D. E.; Ibarbia, L.; Daetz, R.; Bittar, J. H.; Risco, C. A.; Santos, J. E. P.; Ribeiro, E. S.; Galvão, K. N.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 85, 2, pp 230-237
Abstract

The goals of this study were to assess whether the injection of 1 mg of estradiol cypionate (ECP) at 13 days after service of artificial insemination (AI) increases fertility in the study subject and if the same dose injected in the near estrus (20±1 days) after artificial insemination services...

Author(s)
Leyva, C.; Aguilar, D.; Morales, J. L.; Pérez-López, S.; Véliz, F. G.; Soto-Domínguez, A.; Morán Martínez, J.
Publisher
Taylor & Francis, Abingdon, UK
Citation
Journal of Applied Animal Research, 2016, 44, 1, pp 24-26