Pubertal changes in the secretion of gonadotropic hormones, testicular gonadotropic receptors and testicular function in the ram

Domestic Animal Endocrinology
T A Yarney, L M Sanford

Abstract

Developmental changes in pituitary content and secretory patterns of luteinizing hormone (LH), follicle-stimulating hormone (FSH) and prolactin (PRL), testicular size and steroidogenic function, testicular LH- and FSH-binding activity, and growth of the accessory sex organs were examined for 24 Dorset X Leicester X Suffolk rams (born in March) every 30 days from 30 to 150 days of age, and again at 200 days. Pituitary LH and FSH contents increased between 30 and 60 days of age and remained constant until 150 days, when contents were somewhat greater than on either 120 or 200 days. LH-pulse amplitude and frequency, and mean FSH concentration, were highest at 60 and (or) 90 days of age. Testicular growth increased dramatically between 90 and 150 days of age in association with increases in the number of LH- (100-fold) and FSH- (33-fold) binding sites in the testis and a small increase in blood testosterone concentration (1 ng/ml). During the same period, pituitary content and blood concentration of PRL increased to maximal values, epididymal, vesicular gland and bulbourethral gland weights increased 6-fold, and body weight doubled. Between 150 and 200 days of age, testosterone concentration increased considerably (8 ng/ml), as did...Continue Reading

References

Jan 1, 1976·The Journal of Clinical Endocrinology and Metabolism·R T RubinB B Tower
Oct 1, 1988·Canadian Journal of Physiology and Pharmacology·T A YarneyM R Sairam
Aug 15, 1973·Nature: New Biology·K J Catt, M L Dufau
May 1, 1974·Hormone and Metabolic Research = Hormon- Und Stoffwechselforschung = Hormones Et Métabolisme·D G Galloway, J Pelletier
May 1, 1969·Endocrinology·G D NiswenderA V Nalbandov
Sep 1, 1980·Analytical Biochemistry·P J Munson, D Rodbard
Sep 1, 1982·Journal of Reproduction and Fertility·J A Dias, J J Reeves
Apr 1, 1983·International Journal of Andrology·A SundbyV Hansson
Jul 1, 1983·Canadian Journal of Biochemistry and Cell Biology = Revue Canadienne De Biochimie Et Biologie Cellulaire·M I Berman, M R Sairam
Aug 1, 1983·Computer Programs in Biomedicine·G A McPherson
Jan 1, 1984·Journal of Reproduction and Fertility·C Monet-KuntzM Terqui
Jan 1, 1981·Journal of Reproduction and Fertility·K W ChengW M Palmer

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Citations

Aug 31, 2006·Reproduction : the Official Journal of the Society for the Study of Fertility·E T BaguN C Rawlings
Feb 17, 2010·Reproductive Biology and Endocrinology : RB&E·Irina Y LebedevaNahid Parvizi
Feb 18, 2011·PloS One·Georg HagemannChristian Gaser
May 12, 2009·Frontiers in Neuroendocrinology·Christian J PikeAnna M Barron
Oct 30, 2007·Pain·Joel D GreenspanUNKNOWN Consensus Working Group of the Sex, Gender, and Pain SIG of the IASP
Mar 16, 2018·Molecular Reproduction and Development·Francesca MossaAlberto S Atzori
Aug 5, 2004·Journal of Andrology·Andrzej Bartke

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