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

Anogenital distance (AGD) serves as a marker for prenatal androgenization, reproductive development, and fertility in humans and rodents. The primary objectives of this observational study in lactating dairy cows were to (1) characterize the distribution and variability of AGD, (2) determine the...

Author(s)
Gobikrushanth, M.; Bruinjé, T. C.; Colazo, M. G.; Butler, S. T.; Ambrose, D. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 12, pp 9815-9823
Abstract

The primary objective was to determine the variability and repeatability of GnRH-induced LH responses. The secondary objective was to evaluate the associations among plasma LH, FSH, estradiol (E2), and progesterone (P4) concentrations. One hundred lactating Holstein cows (35 primiparous, 65...

Author(s)
Gobikrushanth, M.; Dutra, P. A.; Bruinjé, T. C.; Colazo, M. G.; Butler, S. T.; Ambrose, D. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2017, 100, 8, pp 6753-6762
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

The objective was to evaluate in-line milk progesterone (mP4) data to determine dynamics of pre- and post-insemination mP4 profiles and their associations with parity and outcomes of artificial insemination (AI) in Holstein cows. Milk progesterone (ng/mL) was quantified at pre-determined time...

Author(s)
Bruinjé, T. C.; Gobikrushanth, M.; Colazo, M. G.; Ambrose, D. J.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 102, pp 147-153
Abstract

The objectives were to determine the effects of supplemental fat (no oilseed vs. oilseed) during late gestation and the source of fat (canola vs. sunflower seed), on dry matter intake (DMI), plasma metabolite concentrations, milk production and composition, calf birth weight, postpartum health...

Author(s)
Salehi, R.; Colazo, M. G.; Oba, M.; Ambrose, D. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2016, 99, 5, pp 3584-3597
Abstract

The main objectives of this study were to determine the influence of diets enriched in α-linolenic, linoleic or oleic acid on the development and transcriptomic profile of embryos collected from dairy cattle. Non-lactating Holstein cows received one of the three diets supplemented with 8% rolled...

Author(s)
Salehi, R.; Colazo, M. G.; Tsoi, S.; Behrouzi, A.; Tsang, B. K.; Dyck, M. K.; Oba, M.; Ambrose, D. J.
Publisher
BioScientifica Ltd, Bristol, UK
Citation
Reproduction, 2016, 152, 6, pp 715-726
Abstract

The objective of this retrospective study was to determine the factors affecting pregnancy per artificial insemination (P/AI) and pregnancy loss in lactating dairy cattle. Breeding records (n=1466) for 5 consecutive years were evaluated from one dairy herd. The effects of type of breeding [timed ...

Author(s)
Thangavelu, G.; Gobikrushanth, M.; Colazo, M. G.; Ambrose, D. J.
Publisher
Agricultural Institute of Canada, Ottawa, Canada
Citation
Canadian Journal of Animal Science, 2015, 95, 3, pp 383-388
Abstract

A protocol for presynchronization of ovarian status with 2 injections of PGF given 14 d apart, with the last PGF injection given 12 or 14 d before Ovsynch increases pregnancy per artificial insemination (P/AI) in dairy cows. We determined the efficacy of reducing the interval from the last PGF...

Author(s)
Colazo, M. G.; Ponce-Barajas, P.; Ambrose, D. J.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2013, 96, 12, pp 7640-7648
Abstract

The objective was to compare pregnancy rates in nulliparous Holstein heifers given PGF 24 h before, or concurrent with, removal of an intravaginal progesterone-releasing (CIDR) insert in 3 timed artificial insemination (TAI) protocols. Heifers (from 2 herds) were assigned randomly, over 11 mo, to ...

Author(s)
Ambrose, D. J.; Emmanuel, D. G. V.; Colazo, M. G.; Kastelic, J. P.
Publisher
American Dairy Science Association, Savoy, USA
Citation
Journal of Dairy Science, 2008, 91, 7, pp 2678-2683
Abstract

The objective of this study was to determine the effects of feed restriction and source of dietary fatty acids during the close-up dry period on postcalving reproductive performance of dairy cattle. Thirty-four days before expected calving, pregnant Holstein cows (n=72; parity 1 to 5) were randomly ...

Author(s)
Colazo, M. G.; Hayirli, A.; Doepel, L.; Ambrose, D. J.
Publisher
American Dairy Science Association, Savoy, USA
Citation
Journal of Dairy Science, 2009, 92, 6, pp 2562-2571

Refine Results

Sort Order
Author
Geographical Location
Organisms
Subject Topics