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

The effect of injectable progesterone was evaluated along with estradiol benzoate (EB) on the fate of the dominant follicle (DF) present in the ovary at the beginning of low progesterone-based TAI protocol. All cattle were given 500 µg cloprostenol im (PGF; Schering-Plough Animal Health for...

Author(s)
Pfeifer, L. F. M.; Mapletoft, R. J.; Dinesh Dardawal; Jaswant Singh
Publisher
Faculdade de Medicina Veterinária e Zootecnia, Universidade de São Paulo, São Paulo, Brazil
Citation
Brazilian Journal of Veterinary Research and Animal Science, 2018, 55, 2, pp e136924
Abstract

Protocols designed to control follicular wave dynamics and ovulation in cattle have reduced, and even eliminated, the need for estrus detection. The addition of progestin-releasing devices and gonadotropin treatments, such as equine chorionic gonadotropin, have provided possibilities for increased...

Author(s)
Mapletoft, R. J.; Bó, G. A.
Publisher
American Association of Bovine Practitioners, Stillwater, USA
Citation
Proceedings of the 45th Annual Conference of the American Association of Bovine Practitioners, Montreal, Canada, 20-22 September, 2012, 2012, pp 40-48
Abstract

Pregnancy per AI (P/AI) following the use of 1 of 2 timed AI (TAI) protocols and 2 different intervals between TAI and resynchronization were compared in heifers that were inseminated with either conventional or sex-sorted semen. Holstein heifers (n=317; 527 inseminations) were submitted to a 5-d...

Author(s)
Macmillan, K.; Loree, K.; Mapletoft, R. J.; Colazo, M. G.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 5, pp 4134-4138
Abstract

Compared to Bos taurus breeds, Bos indicus breeds of cattle present several differences in reproductive physiology. Follicular diameter at deviation and at the time of ovulatory capability are smaller in B. indicus breeds. Furthermore, B. indicus breeds have a greater sensitivity to gonadotropins,...

Author(s)
Baruselli, P. S.; SáFilho, M. F. de; Martins, C. M.; Nasser, L. F.; Nogueira, M. F. G.; Barros, C. M.; Bó, G. A.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2006, 65, 1, pp 77-88
Abstract

This journal is a compilation of research articles from different authors that focuses on cattle reproduction; reproductive performance; embryo transfer; oestrus synchronization; superovulation; artificial insemination; hormonal control; in vitro fertilization; fertility; oocyte maturation;...

Author(s)
Mapletoft, R. J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2006, 65, 1, pp 1-115
Abstract

This is a review of the physiology and endocrinology of the estrous cycle and how ovarian physiology can be manipulated and controlled for timed artificial insemination (TAI) in beef and dairy cattle. Estrus detection is required for artificial insemination (AI), but it is done poorly in dairy...

Author(s)
Colazo, M. G.; Mapletoft, R. J.
Publisher
Canadian Veterinary Medical Association, Ottawa, Canada
Citation
Canadian Veterinary Journal, 2014, 55, 8, pp 772-780
Abstract

The main objective of the implementation of Artificial Insemination (AI) in cattle is to produce a sustained genetic progress in the herd. Although AI is an old reproductive biotechnology, its widespread implementation is very recent and is mainly due to the use of protocols that allows the AI...

Author(s)
Bó, G. A.; Baruselli, P. S.; Mapletoft, R. J.
Publisher
Colégio Brasileiro de Reprodução Animal, Belo Horizonte, Brazil
Citation
Animal Reproduction (Belo Horizonte), 2013, 10, 3, pp 137-142
Abstract

Ovulation of an early-stage dominant follicle induced by exogenous GnRH reportedly results in a reduced ovulatory follicle size and fertility in beef and dairy cattle. Objectives were to examine factors associated with ovulatory follicle diameter and the relationship between ovulatory follicle...

Author(s)
Colazo, M. G.; Behrouzi, A.; Ambrose, D. J.; Mapletoft, R. J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2015, 84, 3, pp 377-383
Abstract

In the present study, we tested the hypotheses that oocyte competence is compromised by a longer duration of follicular growth and that it is not affected by FSH starvation. Cows were allocated to short FSH (n=14), FSH starvation (n=13) and long FSH (n=13) groups. The first two groups were given...

Author(s)
Dias, F. C. F.; Costa, E.; Adams, G. P.; Mapletoft, R. J.; Kastelic, J.; Dochi, O.; Singh, J.
Publisher
CSIRO, Collingwood, Australia
Citation
Reproduction, Fertility and Development, 2013, 25, 3, pp 523-530
Abstract

Repeat breeding is an important factor affecting economic success in dairy management. The objective of this study was to investigate the effectiveness of transfer of frozen-thawed IVF embryos in establishing pregnancy in repeat-breeding Holstein cattle. Cumulus oocyte complexes were collected by...

Author(s)
Dochi, O.; Takahashi, K.; Hirai, T.; Hayakawa, H.; Tanisawa, M.; Yamamoto, Y.; Koyama, H.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2008, 69, 1, pp 124-128

Refine Results

Sort Order
Author
Geographical Location
Item Type
Organisms
Subject Topics