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Abstract

Evaluation of the interval from calving to first service, estrus detection, conception rate, pregnancy losses, and culling due to infertility allows for the evaluation of reproductive performance on dairy farms. Target reproductive parameters will depend on the characteristics of the farm related...

Author(s)
Bartolome, J. A.; Archbald, L. F.
Publisher
John Wiley & Sons, Chichester, UK
Citation
Dairy production medicine, 2011, pp 73-79
Abstract

Pregnancy per artificial insemination (AI) was evaluated in dairy cows (Bos taurus) subjected to synchronization and resynchronization for timed AI (TAI). Cows (n=718) received prostaglandin F (PGF) on Days-38 and -24 (Days 39 and 53 postpartum), gonadotropin-releasing hormone (GnRH) on Day-10,...

Author(s)
Bartolome, J. A.; Leeuwen, J. J. J. van; Thieme, M.; Sa'filho, O. G.; Melendez, P.; Archbald, L. F.; Thatcher, W. W.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2009, 72, 6, pp 869-878
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 of this study was to compare reproductive performance of lactating dairy cows bred by natural service (NS) or timed AI (TAI). One thousand fifty-five cows were blocked by parity and enrolled to receive either NS or TAI. Cows in both groups were presynchronized with 2 injections of PGF...

Author(s)
Lima, F. S.; Risco, C. A.; Thatcher, M. J.; Benzaquen, M. E.; Archbald, L. F.; Santos, J. E. P.; Thatcher, W. W.
Publisher
American Dairy Science Association, Savoy, USA
Citation
Journal of Dairy Science, 2009, 92, 11, pp 5456-5466
Abstract

The objective of this study was to evaluate the effect of the interval from the day of administration of bovine somatotropin (bST) to the day of initiation of synchronization of ovulation (Day 0 and 7) and timed-insemination (TAI) on conception rate (CR) of dairy cows with and without ovarian...

Author(s)
Bartolome, J.; Hernandez, J.; Landaeta, A.; Kelleman, A.; Sheerin, P.; Risco, C. A.; Archbald, L. F.
Publisher
Elsevier Science Inc., New York, USA
Citation
Theriogenology, 2002, 57, 4, pp 1293-1301
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

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