Tags

Type your tag names separated by a space and hit enter

Estrus, ovulation, and serum hormones in mares given prostaglandin F2 alpha, estradiol, and gonadotropin-releasing hormone.
Am J Vet Res. 1980 Jan; 41(1):120-2.AJ

Abstract

A gonadotropin-releasing hormone (GnRH) was injected in mares given prostaglandin F2 alpha (PGF2 alpha) to induce luteolysis in an attempt to sunchronize ovulation. Pretreatment with estradiol-17 beta (E2-17 beta) was used to determine whether or not estradiol would enhance the release of luteinizing hormone (LH) after treatment with GnRH. Twelve mares were used in a balanced Latin square crossover design. Mares were injected with PGF2 alpha, treatment A; PGF2 alpha mgnRH, treatment B; or PGF2 alpha me2-17 beta mgnRH, treatment C. The interval +/- SEM from PGF2 alpha injection to estrus was 3.3 +/- 0.2, 3.2 +/- 0.3, and 2.3 +/- 0.1 days for treatments A, B, and C, respectively. The mean interval in days from injection to first ovulation averaged 1 day less (P less than 0.10) for treatments B (6.7 +/- 0.6) and C (6.2 +/- 0.3) than for treatment A (7.6 +/- 0.7). The furation of estrus and the interval from ovulation to end of estrus were similar among the three treatment groups. Mares treated with GnRH (treatments B and C) had a significant (P less than 0.01) two- to threefold increase in LH concentrations when compared with controls. Pretreatment with estradiol-17 beta did not appear to enhance LH release after GnRH was given, and the time of ovulation was not significantly changed by GnRH treatment.

Authors

No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

6987921

Citation

Booth, L C., et al. "Estrus, Ovulation, and Serum Hormones in Mares Given Prostaglandin F2 Alpha, Estradiol, and Gonadotropin-releasing Hormone." American Journal of Veterinary Research, vol. 41, no. 1, 1980, pp. 120-2.
Booth LC, Oxender WD, Douglas RH, et al. Estrus, ovulation, and serum hormones in mares given prostaglandin F2 alpha, estradiol, and gonadotropin-releasing hormone. Am J Vet Res. 1980;41(1):120-2.
Booth, L. C., Oxender, W. D., Douglas, R. H., & Woodley, S. L. (1980). Estrus, ovulation, and serum hormones in mares given prostaglandin F2 alpha, estradiol, and gonadotropin-releasing hormone. American Journal of Veterinary Research, 41(1), 120-2.
Booth LC, et al. Estrus, Ovulation, and Serum Hormones in Mares Given Prostaglandin F2 Alpha, Estradiol, and Gonadotropin-releasing Hormone. Am J Vet Res. 1980;41(1):120-2. PubMed PMID: 6987921.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Estrus, ovulation, and serum hormones in mares given prostaglandin F2 alpha, estradiol, and gonadotropin-releasing hormone. AU - Booth,L C, AU - Oxender,W D, AU - Douglas,R H, AU - Woodley,S L, PY - 1980/1/1/pubmed PY - 1980/1/1/medline PY - 1980/1/1/entrez SP - 120 EP - 2 JF - American journal of veterinary research JO - Am. J. Vet. Res. VL - 41 IS - 1 N2 - A gonadotropin-releasing hormone (GnRH) was injected in mares given prostaglandin F2 alpha (PGF2 alpha) to induce luteolysis in an attempt to sunchronize ovulation. Pretreatment with estradiol-17 beta (E2-17 beta) was used to determine whether or not estradiol would enhance the release of luteinizing hormone (LH) after treatment with GnRH. Twelve mares were used in a balanced Latin square crossover design. Mares were injected with PGF2 alpha, treatment A; PGF2 alpha mgnRH, treatment B; or PGF2 alpha me2-17 beta mgnRH, treatment C. The interval +/- SEM from PGF2 alpha injection to estrus was 3.3 +/- 0.2, 3.2 +/- 0.3, and 2.3 +/- 0.1 days for treatments A, B, and C, respectively. The mean interval in days from injection to first ovulation averaged 1 day less (P less than 0.10) for treatments B (6.7 +/- 0.6) and C (6.2 +/- 0.3) than for treatment A (7.6 +/- 0.7). The furation of estrus and the interval from ovulation to end of estrus were similar among the three treatment groups. Mares treated with GnRH (treatments B and C) had a significant (P less than 0.01) two- to threefold increase in LH concentrations when compared with controls. Pretreatment with estradiol-17 beta did not appear to enhance LH release after GnRH was given, and the time of ovulation was not significantly changed by GnRH treatment. SN - 0002-9645 UR - https://www.unboundmedicine.com/medline/citation/6987921/Estrus_ovulation_and_serum_hormones_in_mares_given_prostaglandin_F2_alpha_estradiol_and_gonadotropin_releasing_hormone_ DB - PRIME DP - Unbound Medicine ER -