Cookies on Animal Science Database

Like most websites we use cookies. This is to ensure that we give you the best experience possible.

 

Continuing to use www.cabi.org  means you agree to our use of cookies. If you would like to, you can learn more about the cookies we use.

Animal Science Database

Supporting your research in animal production, welfare and health

 Sign up to receive our Veterinary & Animal Sciences eNewsletter, book alerts and offers direct to your inbox.

Results per page:

Search results

Abstract

Objectives were to determine the effects of GnRH at the initiation of the 5-d timed artificial insemination (AI) program combined with 2 injections of PGF on ovarian responses and pregnancy per AI (P/AI) in dairy heifers, and the role of progesterone concentrations on LH release and ovulation in...

Author(s)
Lima, F. S.; Ribeiro, E. S.; Bisinotto, R. S.; Greco, L. F.; Martinez, N.; Amstalden, M.; Thatcher, W. W.; Santos, J. E. P.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 11, pp 7054-7065
Abstract

Objective. Characterize the follicular dynamics and luteal growth and regression pattern of multiparous (MB) and heifer (BH) Murrah buffaloes in Colombian tropical conditions. Material and methods. Ten MB and ten BH were synchronized with a progesterone-releasing intravaginal device. No artificial ...

Author(s)
Ojeda R., A.; Londoño O., R.; Gutierrez R., C.; Gonella-Diaza, A.
Publisher
University of Cordoba, Monteria, Colombia
Citation
Revista MVZ Cordoba, 2014, 19, 2, pp 4130-4140
Abstract

Progesterone-containing devices can be inserted intravaginally for 14 d to presynchronize the estrous cycle for timed artificial insemination (TAI) in beef heifers ("14-day CIDR-PG" or "Show-Me-Synch" program). The progesterone treatment is effective for presynchronization because cattle develop a...

Author(s)
Escalante, R. C.; Poock, S. E.; Mathew, D. J.; Martin, W. R.; Newsom, E. M.; Hamilton, S. A.; Pohler, K. G.; Lucy, M. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 9, pp 5102-5108
Abstract

Maximizing reproductive efficiency depends upon whether a heifer attains puberty before the start of the breeding season, conceives early in the breeding season, calves unassisted, raises the calf to the time it is marketed, and the heifer/cow must conceive to calve early during the subsequent...

Author(s)
Lamb, G. C.; Smith, M. F.; Perry, G. A.; Atkins, J. A.; Risley, M. E.; Busch, D. C.; Patterson, D. J.
Publisher
American Association of Bovine Practitioners, Stillwater, USA
Citation
Bovine Practitioner, 2010, 44, 1, pp 18-26
Abstract

Recent estrous synchronization research has aimed to develop reliable protocols that: (1) rely solely on fixed-timed artificial insemination (TAI); (2) require a maximum of three animal handlings; and (3) are successful in estrous-cycling and non-cycling females. In cows, insertion of an...

Author(s)
Lamb, G. C.
Publisher
American Association of Bovine Practitioners, Stillwater, USA
Citation
Bovine Practitioner, 2010, 44, 1, pp 28-35
AbstractFull Text

This study was conducted to investigate the effectiveness of fixed-time artificial insemination (TAI) in dairy heifers treated with progesterone-based protocol. The study was performed at the university farm located in southwestern Brazil in May 2009. A total of 39 cycling crossbred dairy heifers...

Author(s)
Oliveira, L. Z.; Lima, V. F. M. H. de; Oliveira, C. S.; Alves, B. G.; Graff, H. B.; Santos, R. M. dos
Publisher
Universidade Federal do Rio Grande do Sul, Faculdade de Veterinária, Porto Alegre, Brazil
Citation
Acta Scientiae Veterinariae, 2011, 39, 2, pp 964
Abstract

The objective was to monitor changes in ovarian status in heifers exposed to a progesterone insert with or without concurrent GnRH injection. oestrus was manipulated in 283 heifers (31 breeding clusters) by administering GnRH, progesterone, and PGF at 5 stages of the oestrus cycle. oestrus was...

Author(s)
Stevenson, J. S.
Publisher
American Dairy Science Association, Savoy, USA
Citation
Journal of Dairy Science, 2008, 91, 12, pp 4640-4650
Abstract

Results of clinical experiments show that it is possible to unify intervals from a PGF application to LH peak then to ovulation. In a field experiment, fixed time insemination was tested on the basis of data from clinical experiments. Synchronized heifers and high yielding cows received GnRH 65...

Author(s)
Becker, F.; Göllnitz, K.; Alm, H.; Schneider, F.; Nehring, H.; Kanitz, W.
Publisher
Institute for Animal Husbandry, Belgrade, Yugoslavia
Citation
Biotechnology in Animal Husbandry, 2003, 19, 5/6, pp 41-47
Abstract

Postpartum anoestrus Sahiwal cows (n=10), which had not shown any signs of oestrus even after four months of calving, pubertal anoestrus Sahiwal heifers (n=10) at the age of >3 years (3-3.5 years) and weighing 250-350 kg, and anoestrus Sahiwal cattle (n=10, as control). Ov-synch protocol...

Author(s)
Krishna Mohan; Mishra, U. K.; Mishra, O. P.; Khan, J. R.; Prakash, B. S.
Publisher
Indian Veterinary Association, Chennai, India
Citation
Indian Veterinary Journal, 2010, 87, 3, pp 297-298
AbstractFull Text

Author(s)
Gatien, J.; Ponsart, C.; Humblot, P.
Publisher
Société Française de Buiatrie, Labastide St Pierre, France
Citation
European Buiatrics Forum, Palais du Pharo, Marseille, 1-3 December 2009, 2009, pp 164

Refine Results

Sort Order
Author
Geographical Location
Item Type
Language
Organisms
Subject Topics