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Abstract

The primary objective of this study was to determine whether a single measurement of intravaginal electrical resistance (VER), using the commercially available Ovatec® probe, can discriminate between dioestrus and oestrus in Bos indicus females, which had been treated to synchronize oestrus. Santa...

Author(s)
Hockey, C. D.; Norman, S. T.; Morton, J. M.; Boothby, D.; Phillips, N. J.; McGowan, M. R.
Publisher
Blackwell Publishing, Berlin, Germany
Citation
Reproduction in Domestic Animals, 2010, 45, 4, pp 629-636
Abstract

Pregnancy rates of Nelore females inseminated with male-sexed semen and conventional semen from the same bulls were evaluated. The females included 433 heifers (2 years old) and 230 non-suckling cows, totaling 663 animals. Average body condition score was 3.5 (1-5 scale). Estrus was induced with...

Author(s)
Dominguez, J. H. E.; Costa, D. S.; Centurion, V. J.; Faria, F. J. C.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Animal Reproduction Science, 2011, 129, 3/4, pp 127-131
Abstract

Goats are spontaneously ovulating, polyoestrous animals. Oestrous cycles in goats are reviewed in this paper with a view to clarifying interactions between cyclical changes in tissues, hormones and behaviour. Reproduction in goats is described as seasonal; the onset and length of the breeding...

Author(s)
Fatet, A.; Pellicer-Rubio, M. T.; Leboeuf, B.
Publisher
Elsevier Ltd, Oxford, UK
Citation
Animal Reproduction Science, 2011, 124, 3/4, pp 211-219
Abstract

The aim of this study was to compare four methods of estrus resynchronization performed 23 days after timed artificial insemination (TAI) plus estrus observation in Bos indicus cows. Eight hundred fourteen lactating Nelore cows were submitted to TAI and then randomly assigned to one of the five...

Author(s)
Campos, J. T.; Marinho, L. S. R.; Lunardelli, P. A.; Morotti, F.; Seneda, M. M.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2013, 80, 6, pp 619-623
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

Poor estrus expression and the difficulty encountered in predicting the time of ovulation compromise the reproductive efficiency of Murrah buffalo cows. Synchronization of ovulation and timed artificial insemination are able to precisely control the time of ovulation and thus avoid the need for...

Author(s)
Mirmahmoudi, R.; Souri, M.; Prakash, B. S.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2014, 82, 7, pp 1012-1020
Abstract

The aim of this study was to test the effect of expression of estrus at artificial insemination (AI) on endometrium, conceptus, and CL gene expression of beef cows. Thirty-six multiparous nonlactating Nelore cows were enrolled on an estradiol- and progesterone (P4)-based timed AI protocol (AI=Day...

Author(s)
Davoodi, S.; Cooke, R. F.; Fernandes, A. C. C.; Cappellozza, B. I.; Vasconcelos, J. L. M.; Cerri, R. L. A.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 85, 4, pp 645-655
Abstract

Data from 96 Holstein Friesian cows on a commercial dairy farm were used to investigate whether body condition and serum levels of nonesterified fatty acids (NEFAs) postpartum (pp) affect progesterone (P4) levels, estrous activity, and fertility in dairy cows. The examination period started 14 days ...

Author(s)
Lüttgenau, J.; Purschke, S.; Tsousis, G.; Bruckmaier, R. M.; Bollwein, H.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 85, 4, pp 656-663

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