Aging in men is associated with modest changes of the secretory and regulatory functions of
the hypothalamic-pituitary-testicular axis. Similarly, some age-related changes in …

Long-standing beliefs have associated aging in men with declines in sexual performance,
sex steroid serum levels, and fertility. Critical analysis of recent data, however, indicates that …

Aging of humans is associated with functional alterations at all levels of the reproductive axis
and affects both steroidogenic and spermatogenic compartments. Unlike female …

A wide variety of disorders, medications, physical factors, and trauma can alter testicular
function and reproductive function in men as they age. There are no precise age limits for …

For centuries, the importance of the testes for the maintenance of male phenotype,
psychosexual behavior, and physical power has been recognized. Indeed, testicular extracts …

Aging in men is accompanied by a gradual decline of all physiologcal functions, involving
the heart, lungs, kidneys, liver and brain as well as the endocrine system. The …

Aging in healthy men is accompanied by a progressive decline of gonadal function with, in
particular, a decline of Leydig cell function and decreased testosterone production …

This review discusses the following aspects of ageing in male mammals: differential viability
and its effects on sex ratio, decline in sexual activity, degeneration of the testis, decline in …

Ageing is associated with structural and functional alterations in all organs of the human
body. The ageing of gonads represents in this respect a special case, because these organs …

A cross-sectional study on 220 men, aged 41–93 yr, was conducted to determine whether
age-related changes in circulating pituitary and gonadal hormone levels are related to …