The ultrastructure of the progressive testicular involution with advancing age in men is
reviewed. There is no definite age at which testicular involution begins, and the onset and …

A histologic study of ageing testes, removed surgically from 'healthy'men aged 52–100
years, is presented. The age-related changes noted were: tubular sclerosis, Leydig cell …

Ultractructural study of seminiferous tubules in ageing men revealed a varying degree of
spermatogenetic arrest associated with changes in the Sertoli cells. Approximately half of …

The histological and morphometric features of the aged golden hamster testis were
examined and compared with those of adult animals. Three age groups (6, 12 and 18 …

Age‐associated architectural changes of the human testicular micro‐vasculature from 70
autopsy cases were stereoscopically examined with a silicone‐rubber injection technique. In …

The human testis has been evaluated by its endocrine function, daily sperm output in
ejaculates, general appearance of seminiferous tubules, differential cell counts in the testis …

The observation of different types of seminiferous tubules (from tubules with normal
spermatogenesis to sclerosed tubules) in aging human testes points to the progressive …

An endocrinologic and quantitative histologic study was carried out in 64 elderly men who
underwent orchidectomy owing to prostatic carcinoma. The men were classified into age …

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THE growth of our knowledge of the histophysiology of the testis has been closely tied to the
development of new methods for the study of its structure. The principal events in …