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Abstract

Two protocols are now available for using oxytocin treatment to induce prolonged CL function to suppress estrous behavior in performance mares. One protocol involves determining the day of ovulation, and administering 60 units of oxytocin intramuscularly (IM) once daily on days 7 to 14 after...

Author(s)
Vanderwall, D. K.; Kinney, D. L.; Mason, H.; Rigas, J.
Publisher
The Society for Theriogenology, Montgomery, USA
Citation
Clinical Theriogenology, 2017, 9, 3, pp 445
Abstract

The objectives were to: (1) evaluate the efficacy of varying intervals of oxytocin administration in preventing luteolysis in mares; (2) examine PGF release in mares experiencing prolonged diestrus secondary to oxytocin treatment; and (3) evaluate the endometrial expression of oxytocin receptor,...

Author(s)
Keith, L.; Ball, B. A.; Scoggin, K.; Esteller-Vico, A.; Woodward, E. M.; Troedsson, M. H. T.; Squires, E. L.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2013, 79, 4, pp 616-624
Abstract

Background: Secretion of histotroph during the prolonged pre-implantation phase in mares is crucial to pregnancy maintenance, manifested as increased embryonic loss in mares with age-related endometrial degeneration. Glycogen content of uterine histotroph is higher during the progesterone-dominated ...

Author(s)
Bramer, S. A.; Macedo, A.; Klein, C.
Publisher
BioMed Central Ltd, London, UK
Citation
Reproductive Biology and Endocrinology, 2017, 15, 4, pp (5 January 2017)
Abstract

Prolonging function of the corpus luteum (CL) is a method of suppressing estrus that uses continued secretion of endogenous progesterone to keep mares out of heat naturally. The most common method of prolonging CL function has been intrauterine insertion of a glass ball (i.e., marble). However,...

Author(s)
Vanderwall, D. K.; Parkinson, K. C.; Rigas, J.
Publisher
Elsevier, New York, USA
Citation
Journal of Equine Veterinary Science, 2016, 36, pp 1-4
Abstract

The objectives of this study were to (1) compare the effect of twice versus once daily administration of oxytocin on days 7-14 after ovulation on the duration of corpus luteum (CL) function and (2) determine the effect of oxytocin treatment on endometrial oxytocin receptor concentration in mares....

Author(s)
Vanderwall, D. K.; Rasmussen, D. M.; Carnahan, K. G.; Davis, T. L.
Publisher
Elsevier, New York, USA
Citation
Journal of Equine Veterinary Science, 2012, 32, 9, pp 536-541
Abstract

The correct feeding of animals has become an increasingly important public issue. Appropriate animal nutrition, and especially the prevention of dietary problems and related diseases are inevitable aspects of a modern veterinary practice. The aim of this study was to investigate the influence of...

Author(s)
Izsáková, E.; Pošivák, J.; Novotný, F.; Valocký, I.; Pošiváková, T.
Publisher
University of Veterinary Medicine and Pharmacy in Košice, Košice, Slovakia
Citation
Folia Veterinaria, 2014, 58, 2, pp 98-100
Abstract

Intrauterine plant oil infusion, including fractionated coconut oil, has been previously found to be a safe, inexpensive, and reversible method of prolonging the luteal phase in mares when administered on Day 10 of the estrous cycle. Our objective was to understand the uteroovarian response to the...

Author(s)
Amorim, M. D. de; Nielsen, K.; Cruz, R. K. S.; Card, C.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2016, 86, 2, pp 545-550
AbstractFull Text

The orally active synthetic progestin altrenogest is widely considered to be the "gold-standard" method of inhibiting estrous behavior in mares. However, its expense, need for long-term daily administration, safety concerns for personnel during handling, and increased public scrutiny regarding the...

Author(s)
Vanderwall, D. K.
Publisher
American Association of Equine Practitioners (AAEP), Lexington, USA
Citation
Proceedings of the 59th Annual Convention of the American Association of Equine Practitioners, Nashville, Tennessee, USA, 7-11 December 2013, 2013, pp 342-349
Abstract

Oxytocin (OXT) has been used to prolong the luteal phase in mares, but its mechanism of action is unknown. The aim of this study was to evaluate the effect of chronic exogenous OXT administration to mid-luteal phase mares on luteal maintenance. Also, endometrial expression of prostaglandin...

Author(s)
Rebordão, M. R.; Galvão, A.; Pinto-Bravo, P.; Pinheiro, J.; Gamboa, S.; Silva, E.; Mateus, L.; Ferreira-Dias, G.
Publisher
Elsevier, New York, USA
Citation
Theriogenology, 2017, 87, pp 193-204
Abstract

Objective - To determine whether IM administration of exogenous oxytocin twice daily on days 7 to 14 after ovulation blocks luteolysis and causes prolonged function of corpora lutea (CL) in mares. Design - Prospective study. Animals - 12 mares. Procedures - Beginning on the day of ovulation (day...

Author(s)
Vanderwall, D. K.; Rasmussen, D. M.; Woods, G. L.
Publisher
American Veterinary Medical Association, Schaumburg, USA
Citation
Journal of the American Veterinary Medical Association, 2007, 231, 12, pp 1864-1867

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