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Differential regulation of the secretion of luteinizing hormone and follicle-stimulating hormone around the time of ovulation in the bitch.
Theriogenology. 2006 Oct; 66(6-7):1419-22.T

Abstract

Plasma concentrations of luteinizing hormone (LH) and follicle stimulating hormone (FSH) were determined 3-6 times daily in six Beagle bitches from the start of the follicular phase until 5 d after the estimated day of ovulation. The aim of the study was to gain more detailed information regarding the changes in and the temporal relation between these hormones around the time of ovulation. In all bitches, the pre-ovulatory LH surge was accompanied by a pre-ovulatory FSH surge. The mean duration of the pre-ovulatory FSH surge (110 +/- 8 h) was significantly longer than that of the pre-ovulatory LH surge (36 +/- 5 h). The FSH surge started concomitantly with the pre-ovulatory LH surge in four bitches, and 12 h before the start of the LH surge in the other two bitches. The pre-ovulatory LH surge had a bifurcated pattern in four bitches. The mean plasma LH concentration before (1.9 +/- 0.4 microg/L) and after (1.9 +/- 0.3 microg/L) the pre-ovulatory LH surge were similar. The mean plasma FSH concentration during the period 72-28 h before the pre-ovulatory LH surge (1.6 +/- 0.3 U/L) was lower (P < 0.001) than that during the period 100-144 h after the pre-ovulatory LH surge (3.1 +/- 0.2U/L). In conclusion, this study demonstrated concurrent pre-ovulatory surges of FSH and LH and provided more evidence for differential regulation of the secretion of FSH and LH.

Authors+Show Affiliations

Department of Clinical Sciences of Companion Animals, Faculty of Veterinary Medicine, Utrecht University, Yalelaan 8, 3508 TD Utrecht, The Netherlands. J.deGier@vet.uu.nlNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16529805

Citation

de Gier, J, et al. "Differential Regulation of the Secretion of Luteinizing Hormone and Follicle-stimulating Hormone Around the Time of Ovulation in the Bitch." Theriogenology, vol. 66, no. 6-7, 2006, pp. 1419-22.
de Gier J, Kooistra HS, Djajadiningrat-Laanen SC, et al. Differential regulation of the secretion of luteinizing hormone and follicle-stimulating hormone around the time of ovulation in the bitch. Theriogenology. 2006;66(6-7):1419-22.
de Gier, J., Kooistra, H. S., Djajadiningrat-Laanen, S. C., Dieleman, S. J., & Okkens, A. C. (2006). Differential regulation of the secretion of luteinizing hormone and follicle-stimulating hormone around the time of ovulation in the bitch. Theriogenology, 66(6-7), 1419-22.
de Gier J, et al. Differential Regulation of the Secretion of Luteinizing Hormone and Follicle-stimulating Hormone Around the Time of Ovulation in the Bitch. Theriogenology. 2006;66(6-7):1419-22. PubMed PMID: 16529805.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Differential regulation of the secretion of luteinizing hormone and follicle-stimulating hormone around the time of ovulation in the bitch. AU - de Gier,J, AU - Kooistra,H S, AU - Djajadiningrat-Laanen,S C, AU - Dieleman,S J, AU - Okkens,A C, Y1 - 2006/03/09/ PY - 2006/3/15/pubmed PY - 2006/11/15/medline PY - 2006/3/15/entrez SP - 1419 EP - 22 JF - Theriogenology JO - Theriogenology VL - 66 IS - 6-7 N2 - Plasma concentrations of luteinizing hormone (LH) and follicle stimulating hormone (FSH) were determined 3-6 times daily in six Beagle bitches from the start of the follicular phase until 5 d after the estimated day of ovulation. The aim of the study was to gain more detailed information regarding the changes in and the temporal relation between these hormones around the time of ovulation. In all bitches, the pre-ovulatory LH surge was accompanied by a pre-ovulatory FSH surge. The mean duration of the pre-ovulatory FSH surge (110 +/- 8 h) was significantly longer than that of the pre-ovulatory LH surge (36 +/- 5 h). The FSH surge started concomitantly with the pre-ovulatory LH surge in four bitches, and 12 h before the start of the LH surge in the other two bitches. The pre-ovulatory LH surge had a bifurcated pattern in four bitches. The mean plasma LH concentration before (1.9 +/- 0.4 microg/L) and after (1.9 +/- 0.3 microg/L) the pre-ovulatory LH surge were similar. The mean plasma FSH concentration during the period 72-28 h before the pre-ovulatory LH surge (1.6 +/- 0.3 U/L) was lower (P < 0.001) than that during the period 100-144 h after the pre-ovulatory LH surge (3.1 +/- 0.2U/L). In conclusion, this study demonstrated concurrent pre-ovulatory surges of FSH and LH and provided more evidence for differential regulation of the secretion of FSH and LH. SN - 0093-691X UR - https://www.unboundmedicine.com/medline/citation/16529805/Differential_regulation_of_the_secretion_of_luteinizing_hormone_and_follicle_stimulating_hormone_around_the_time_of_ovulation_in_the_bitch_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0093-691X(06)00091-4 DB - PRIME DP - Unbound Medicine ER -