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Abstract

This study examined the influence of a GnRH agonist containing either 450 or 750 µg of deslorelin in an implant form or a gonadorelin injection (control) to induce ovulation in the Ovsynch protocol on pregnancy rates (PR), embryonic loss, and ovarian function in 593 lactating Holstein cows. Cows...

Author(s)
Santos, J. E. P.; Bartolome, J. A.; Cerri, R. L. A.; Juchem, S. O.; Hernandez, O.; Trigg, T.; Thatcher, W. W.
Publisher
Elsevier Science Inc., New York, USA
Citation
Theriogenology, 2004, 61, 2/3, pp 421-435
Abstract

Author(s)
Thatcher, W. W.; Bartolome, J. A.; Sozzi, A.; Silvestre, F.; Santos, J. E. P.
Publisher
Kluwer Academic Publishers, Dordrecht, Netherlands
Citation
Veterinary Research Communications, 2004, 28, suppl 1, pp 111-119
Abstract

The objective of this study was to determine the effect of GnRH (100 µg i.m.) treatment 5 and 15 days after timed insemination (TAI) on pregnancy rate and pregnancy loss in lactating dairy cows subjected to synchronization of ovulation. The study included 831 lactating dairy cows subjected to a...

Author(s)
Bartolome, J. A.; Melendez, P.; Kelbert, D.; Swift, K.; McHale, J.; Hernandez, J.; Silvestre, F.; Risco, C. A.; Arteche, A. C. M.; Thatcher, W. W.; Archbald, L. F.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2005, 63, 4, pp 1026-1037
Abstract

The objective was to compare pregnancy rates to resynchronization and timed AI (TAI) protocols in lactating dairy cows that received GnRH at 23 d and were diagnosed not pregnant at 30 d after the pre-enrollment AI. Nonpregnant cows (624) at ultrasonography on day 30 (study day 0) were classified as ...

Author(s)
Bartolome, J. A.; Sozzi, A.; McHale, J.; Swift, K.; Kelbert, D.; Archbald, L. F.; Thatcher, W. W.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2005, 63, 6, pp 1643-1658