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Endocrinology, Vol 100, 122-127, Copyright © 1977 by Endocrine Society

ARTICLES

Developmental changes in serum luteinizing hormone, follicle stimulating hormone and androgen levels in males of two inbred mouse strains

MK Selmanoff, BD Goldman and BE Ginsburg

A comprehensive developmental study of serum LH, FSH and androgen concentrations was carried out in male mice of two inbred strains. Gonadotropic hormone (GTH) levels rose 10-15 days prior to the pubertal increase in serum androgen with FSH preceding LH in this regard. In both strains GTH titer rose to a peak at 30 or 35 days and then steadily declined to adult levels which were strain-specific. Serum androgen was detected at low, relatively steady levels until the pubertal increase between 30 and 50 days postpartum. The results are interpreted as supporting the hypothesis that a shift in feedback sensitivity, occurring at about 20 days of age, may be involved in the onset of puberty in the male mouse.




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Endocrinology Endocrine Reviews J. Clin. End. & Metab.
Molecular Endocrinology Recent Prog. Horm. Res. All Endocrine Journals
Copyright © 1977 by The Endocrine Society