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Animal Science Database

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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

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

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

We investigated the relationships between conception rates (CRs) at first service in Japanese Holstein heifers (i.e. animals that had not yet had their first calf) and cows and their test-day (TD) milk yields. Data included records of artificial insemination (AI) for heifers and cows that had...

Author(s)
Hagiya, K.; Terawaki, Y.; Yamazaki, T.; Nagamine, Y.; Itoh, F.; Yamaguchi, S.; Abe, H.; Gotoh, Y.; Kawahara, T.; Masuda, Y.; Suzuki, M.
Publisher
Cambridge University Press, Cambridge, UK
Citation
Animal, 2013, 7, 9, pp 1423-1428
Abstract

The aim of this study was to examine the effect of sex-sorted semen on the number and quality of embryos recovered from superovulated heifers and cows on commercial dairy farm conditions in Finland. The data consist of 1487 commercial embryo collections performed on 633 and 854 animals of Holstein...

Author(s)
Kaimio, I.; Mikkola, M.; Lindeberg, H.; Heikkinen, J.; Hasler, J. F.; Taponen, J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2013, 80, 8, pp 950-954
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

The objective was to compare reproductive performance with management programs based on an automated activity monitoring (AAM) system or a synchronized breeding program under field conditions. In total, 1,429 Holstein cows from 3 commercial herds in Ontario, Canada, were enrolled over 1 yr in a...

Author(s)
Neves, R. C.; Leslie, K. E.; Walton, J. S.; Leblanc, S. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 10, pp 5683-5693
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

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 objective of this study was to clarify the effects of a second protocol of ovulation synchronisation starting on day 26 after timed artificial insemination on ovarian profile and days open in dairy cows diagnosed as nonpregnant. Ninety-four Holstein-Friesian cows received intramuscular...

Author(s)
Osawa, T.; Honjou, S.; Nitta, H.; Uchiza, M.; Tameoka, N.; Moro, Y.; Izaike, Y.
Publisher
Society for Reproduction and Development (, Tokyo, Japan
Citation
Journal of Reproduction and Development, 2009, 55, 2, pp 163-169

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