Differential regulation of the secretion of luteinizing hormone and follicle-stimulating hormone around the time of ovulation in the bitch

Theriogenology
J de GierA C Okkens

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 co...Continue Reading

References

Dec 1, 1979·General and Comparative Endocrinology·S J Dieleman, H J Schoenmakers
Jan 11, 1975·Proceedings of the Society for Experimental Biology and Medicine·T M NettG D niswender
Jun 1, 1992·The Journal of Endocrinology·G E MannD T Baird
Jan 1, 1983·Endocrine Reviews·S C ChappelC Coutifaris
Oct 1, 1983·The Journal of Clinical Endocrinology and Metabolism·J D HoffS S Yen
Nov 1, 1984·Journal of Reproduction and Fertility·S J Dieleman, D M Blankenstein
Feb 1, 1997·Biology of Reproduction·F J KarschS M Moenter
Aug 19, 1997·Proceedings of the National Academy of Sciences of the United States of America·W H YuS M McCann
Oct 1, 1996·Trends in Endocrinology and Metabolism : TEM·M A Shupnik

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Citations

Jul 25, 2008·Reproduction in Domestic Animals = Zuchthygiene·J de GierA C Okkens
Nov 17, 2006·Reproduction in Domestic Animals = Zuchthygiene·J J C W M BuijtelsA C Okkens
May 4, 2017·Tierärztliche Praxis. Ausgabe K, Kleintiere/Heimtiere·Andrea PiepenbrinkBernd Hoffmann

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