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

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 …

Aging of the testis is a normal physiological process, which gradually proceeds with
increasing age. Under normal conditions, an abrupt breaking off the spermatogenetic and …

A spermatocele refers to the cystic accumulation of semen in the male reproductive tract.
Although it is thought to be caused by narrowing of the lumen of the excurrent duct with …

Two types of degenerating seminiferous tubules were found in cryptorchid testes with Sertoli
cell hyperplasia of children and adults: 1) tubules with central degeneration, and 2) tubules …

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 …

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 …

In this study, we examined the age-related changes on morphometric parameters and
ultrastructure of seminiferous tubules, and on the expression of extracellular matrix proteins …

Steroidogenesis and spermatogenesis decrease in aging Brown Norway rats. We therefore
hypothesized that there must be accompanying morphological changes taking place in the …

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 …