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Abstract

The aim was to assess the ability of corpus luteum (CL) and uterine ultrasound characteristics on d 18 to 21 to predict pregnancy status in lactating dairy cows. Ultrasound examinations were carried out on cows (n=164) on d 18 to 21 following artificial insemination (AI). Images of the uterus and...

Author(s)
Scully, S.; Butler, S. T.; Kelly, A. K.; Evans, A. C. O.; Lonergan, P.; Crowe, M. A.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2014, 97, 6, pp 3542-3557
Abstract

The aim was to characterize changes in the ultrasound characteristics of the CL and uterus in pregnant, inseminated nonpregnant, and cyclic beef heifers and to correlate findings with systemic progesterone (P4) concentrations with the intention of identifying possible markers for early...

Author(s)
Scully, S.; Evans, A. C. O.; Carter, F.; Duffy, P.; Lonergan, P.; Crowe, M. A.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2015, 83, 3, pp 449-458
Abstract

Progesterone treatments are used to increase submission rates in postpartum dairy cows; however, in many cases the protocol is used as a blanket therapy for all cows without regard for physiological or disease state. The objective of this study was to identify the physiological or disease classes...

Author(s)
McNally, J. C.; Crowe, M. A.; Roche, J. F.; Beltman, M. E.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2014, 82, 9, pp 1263-1272
Abstract

Lactating dairy cows (n=57) ≥45 d postpartum at first service were enrolled in a randomized complete block design study to evaluate treatments to synchronize estrus and ovulation. At 10 d before artificial insemination (AI), animals were randomly assigned to 1 of 3 treatments: (1) d -10 GnRH...

Author(s)
Herlihy, M. M.; Crowe, M. A.; Diskin, M. G.; Butler, S. T.
Publisher
Elsevier Inc., Philadelphia, USA
Citation
Journal of Dairy Science, 2012, 95, 2, pp 743-754