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Abstract

The objective of this study was to evaluate the conception rate of crossbred heifers (n=50) and cows (n=50) inseminated with sexed and conventional semen between 18 and 24 hours after estrous detection. The synchronization protocol of the estrous cycle started on day zero (D0) by inserting the...

Author(s)
Peres, A. R.; Ifran, A. M.; Lima, M. R. de; Rossi, G. F.; Corrêa, R. R.; Garcia, J. M.
Publisher
Faculdade de Veterinaria, Universidade Federal Fluminense, Niterói, Brazil
Citation
Revista Brasileira de Ciência Veterinária, 2016, 23, 3/4, pp 186-190
AbstractFull Text

The has been no report published on the economical losses associated with errors in oestrus detection in cows under Iranian intensive dairy management. The study was conducted to determine the accuracy of oestrus detection by farmers using artificial insemination in Shiraz dairy farms. Milk samples ...

Author(s)
Kafi, M.; Zibaei, M.; Rahbari, A.
Publisher
Shiraz University Press, Shiraz, Iran
Citation
Iranian Journal of Veterinary Research, 2007, 8, 2, pp 131-137
Abstract

One aim of this study was to compare the reproductive performance of cows and heifers when resynchronizing returns to oestrus for a second insemination by treating with an intravaginal progesterone-releasing device (IVD) for 7 or 8 d when estradiol benzoate (EB) was administered at the start of...

Author(s)
Cavalieri, J.; Hepworth, G.; Smart, V. M.; Ryan, M.; Macmillan, K. L.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2007, 67, 4, pp 824-834