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Animal Science Database

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Abstract

Fertility traits were recently added to the evaluation of genetic merit, allowing for the selection of Holstein cattle with improved reproductive performance. In the current study, we investigated the associations among genomic merit for daughter pregnancy rate (GDPR) and heifer conception rate...

Author(s)
Veronese, A.; Marques, O.; Peñagaricano, F.; Bisinotto, R. S.; Pohler, K. G.; Bilby, T. R.; Chebel, R. C.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2019, 102, 7, pp 6639-6648
Abstract

Improving artificial insemination (AI) pregnancy rates in replacement heifers improves the genetic advancement within a herd. Heifers that have completed at least three estrous cycles prior to breeding have greater pregnancy rates compared to acyclic females. Therefore, it was hypothesized that a...

Author(s)
Monn, R. E.; Poole, R. K.; Mackey, J. C.; Mayberry, K. J.; Dudley, H. B.; Alley, M.; Poole, D. H.
Publisher
Oxford University Press, Oxford, UK
Citation
Translational Animal Science, 2019, 3, 1, pp 456-463
Abstract

Infertility remains the most prevalent reason for cattle being removed from production environments. We utilized metabolomic profiling to identify metabolites in the blood plasma that may be useful in identifying infertile heifers at the time of artificial insemination (AI). Prior to AI, phenotypic ...

Author(s)
Phillips, K. M.; Read, C. C.; Kriese-Anderson, L. A.; Rodning, S. P.; Brandebourg, T. D.; Biase, F. H.; Marks, M. L.; Elmore, J. B.; Stanford, M. K.; Dyce, P. W.
Publisher
Nature Publishing Group, London, UK
Citation
Scientific Reports, 2018, 8, 1, pp 13196
Abstract

Our objectives were to determine the effects of the administration of recombinant bovine somatotropin (bST) at the initiation of a fixed-time AI (TAI) protocol on concentrations of plasma IGF-1, follicle diameter, embryo/fetal size, and pregnancy rates in replacement beef heifers. Four hundred and...

Author(s)
Oosthuizen, N.; Fontes, P. L. P.; Henry, D. D.; Ciriaco, F. M.; Sanford, C. D.; Canal, L. B.; Moraes, G. V. de; DiLorenzo, N.; Currin, J. F.; Clark, S.; Whittier, W. D.; Mercadante, V. R. G.; Lamb, G. C.
Publisher
Oxford University Press, Cary, USA
Citation
Journal of Animal Science, 2018, 96, 5, pp 1894-1902
Abstract

Effects of phytoestrogen isoflavones in Berseem clover on hormonal balance during early pregnancy and fertility of heifers were studied. Holstein heifers (n=26) were divided into two equal homogenous groups. Heifers in the first group (Clover-fed group) were fed Egyptian clover (Trifolium...

Author(s)
Hashem, N. M.; El-Azrak, K. M.; Sallam, S. M. A.
Publisher
Elsevier B. V., Amsterdam, Netherlands
Citation
Animal Reproduction Science, 2016, 170, pp 121-127
Abstract

The objectives were to determine whether rates of conception, ovulation, presynchronization, or follicle and CL characteristics were altered after modifying the Double-Ovsynch (DO) protocol to include hCG compared with the DO protocol. Primiparous and multiparous lactating dairy cows (N=183), and...

Author(s)
Binversie, J. A.; Pfeiffer, K. E.; Larson, J. E.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2012, 78, 9, pp 2095-2104
Abstract

We determined the effects of hCG on ovarian response, concentration of progesterone, and fertility in a fixed-time AI (TAI) protocol. Four hundred forty-four crossbred beef heifers were synchronized with the CO-Synch+CIDR (controlled internal drug-releasing insert) protocol. In addition, heifers...

Author(s)
Dahlen, C. R.; Marquezini, G. H. L.; Larson, J. E.; Lamb, G. C.
Publisher
American Society of Animal Science, Savoy, USA
Citation
Journal of Animal Science, 2011, 89, 9, pp 2750-2758
Abstract

This study evaluated fertility in swamp buffalo after synchronization of ovulation combined with fixed time artificial insemination. At the start of the study, designated day 0, from a group of 98 female Thai swamp buffalo, 55 buffalo (heifers n°=20 and cows n°=35) were selected to be synchronized...

Author(s)
Chaikhun, T.; Tharasanit, T.; Rattanatep, J.; Rensis, F. de; Techakumphu, M.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2010, 74, 8, pp 1371-1376
Abstract

11 Swedish Red-and-White and Swedish Friesian heifers with normal oestrous cycles were monitored for signs of oestrus; the growth of the ovulatory follicle and ovulation were determined by frequent ultrasonic scanning and artificial insemination was carried out 12 h after the detection of standing...

Author(s)
Duchens, M.; Forsberg, M.; Gustafsson, H.; Edqvist, L.; Rodríguez-Martínez, H.
Citation
Animal Reproduction Science, 1995, 39, 3, pp 171-182
Abstract

ALSMEYER, R. H., PALMER, A. Z., KOGER, M., and KIRK, W. G. Some genetic aspects of tenderness in beef: 1137. ANDERSON, L. L., DAY, B. N., EMMERSON, M. A., HAZEL, L. N., and MELAMPY, R. M. Effect of oestrogen and progesterone on early embryonic mortality in ovariectomized gilts: 1234-1235. BAIRD, D. ...

Citation
Journal of Animal Science, 1958, 17, pp 1136-1251

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