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Effect of transportation on the estrous cycle and concentrations of hormones in mares.
J Anim Sci. 1990 Feb; 68(2):419-26.JA

Abstract

Effect of transportation on estrous behavior, duration of the estrous cycle, ovulation, pregnancy rates and concentrations of serum cortisol, plasma ascorbic acid (AA), LH, estradiol and progesterone in mares was investigated. Fifteen mares were transported for 792 km (12 h) during the preovulatory stage of estrus. Transported mares were bled immediately before transport (baseline), at midtrip and 0, 12, 24, 48 and 72 h post-transport and twice daily from d 1 before transport to d 1 (estrogen) or 3 (LH) post-ovulation. Blood samples also were taken for progesterone on d 0, 2, 6, 10, 15, 16, 17, 18, 19 and 20 post-ovulation. Nontransported control mares (n = 15) were bled on the same schedule as transported mares. There was no difference (P greater than .05) in number of mares ovulating, estrous behavior, duration of the estrous cycle or pregnancy rate between groups. Cortisol in transported mares increased to concentrations greater (P less than .05) than those in control mares at midtrip and 0 h post-transport. Concentrations of AA in transported mares also increased (P less than .05) at midtrip, then decreased (P less than .05) below baseline at 24 h post-transport. Concentrations of LH and estradiol increased (P less than .05) above baseline throughout the blood-sampling period. Increases apparently were due to preovulatory surges of these hormones. Increase in LH concentrations in transported mares, however, was greater (P less than .05) than that in control mares at 0 h post-transport.(

ABSTRACT

TRUNCATED AT 250 WORDS)

Authors+Show Affiliations

Anim. Reprod. Lab., Colorado State University, Fort Collins 80523.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

2312431

Citation

Baucus, K L., et al. "Effect of Transportation On the Estrous Cycle and Concentrations of Hormones in Mares." Journal of Animal Science, vol. 68, no. 2, 1990, pp. 419-26.
Baucus KL, Squires EL, Ralston SL, et al. Effect of transportation on the estrous cycle and concentrations of hormones in mares. J Anim Sci. 1990;68(2):419-26.
Baucus, K. L., Squires, E. L., Ralston, S. L., McKinnon, A. O., & Nett, T. M. (1990). Effect of transportation on the estrous cycle and concentrations of hormones in mares. Journal of Animal Science, 68(2), 419-26.
Baucus KL, et al. Effect of Transportation On the Estrous Cycle and Concentrations of Hormones in Mares. J Anim Sci. 1990;68(2):419-26. PubMed PMID: 2312431.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of transportation on the estrous cycle and concentrations of hormones in mares. AU - Baucus,K L, AU - Squires,E L, AU - Ralston,S L, AU - McKinnon,A O, AU - Nett,T M, PY - 1990/2/1/pubmed PY - 1990/2/1/medline PY - 1990/2/1/entrez SP - 419 EP - 26 JF - Journal of animal science JO - J. Anim. Sci. VL - 68 IS - 2 N2 - Effect of transportation on estrous behavior, duration of the estrous cycle, ovulation, pregnancy rates and concentrations of serum cortisol, plasma ascorbic acid (AA), LH, estradiol and progesterone in mares was investigated. Fifteen mares were transported for 792 km (12 h) during the preovulatory stage of estrus. Transported mares were bled immediately before transport (baseline), at midtrip and 0, 12, 24, 48 and 72 h post-transport and twice daily from d 1 before transport to d 1 (estrogen) or 3 (LH) post-ovulation. Blood samples also were taken for progesterone on d 0, 2, 6, 10, 15, 16, 17, 18, 19 and 20 post-ovulation. Nontransported control mares (n = 15) were bled on the same schedule as transported mares. There was no difference (P greater than .05) in number of mares ovulating, estrous behavior, duration of the estrous cycle or pregnancy rate between groups. Cortisol in transported mares increased to concentrations greater (P less than .05) than those in control mares at midtrip and 0 h post-transport. Concentrations of AA in transported mares also increased (P less than .05) at midtrip, then decreased (P less than .05) below baseline at 24 h post-transport. Concentrations of LH and estradiol increased (P less than .05) above baseline throughout the blood-sampling period. Increases apparently were due to preovulatory surges of these hormones. Increase in LH concentrations in transported mares, however, was greater (P less than .05) than that in control mares at 0 h post-transport.(ABSTRACT TRUNCATED AT 250 WORDS) SN - 0021-8812 UR - https://www.unboundmedicine.com/medline/citation/2312431/Effect_of_transportation_on_the_estrous_cycle_and_concentrations_of_hormones_in_mares_ L2 - https://academic.oup.com/jas/article-lookup/doi/10.2527/1990.682419x DB - PRIME DP - Unbound Medicine ER -