Abstract

ABSTRACTThe diameter and area of the seminiferous tubules and the thickness of the germinal epithelium was measured in testes removed from clinically normal dogs of different breeds and mixed ages over a 24 month period which were presented for elective castration or euthanasia. Peripheral plasma testosterone concentrations were determined at the same time.There was no effect of the season of the year on the tubular diameter, thickness of germinal epithelium or tubular area. There was evidence of an effect of age upon tubular diameter and thickness of the germinal epithelium.Peripheral plasma testosterone concentrations were significantly higher in summer and autumn than in winter and spring, but age appeared to have no effect.

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