A decrease in sexual activity with increasing age has been generally accepted as an
established fact by the lay public, and ever since Brown Sequard's and Voronoff's …

The adult human testis secretes a number of steroids which have potential or actual
biological activity. These substances include testosterone, 17a-hydroxyprogesterone …

Testicular endocrine function and androgen-dependent secondary sexual characteristics
were assessed in 283 men 18 to 96 years of age. Mean serum total testosterone levels …

Abstract In 1889 brown-sequard (1), then 72 years old, injected a testicular extract into
himself and experienced a return of his youthful sense of well-being. Since this historically …

The development of prostatic hyperplasia is an almost universal feature of aging men and
dogs, and in both species the condition is a major cause of morbidity. Since prostatic …

Measurements of testosterone concentrations in peripheral and spermatic venous blood
have yielded conflicting results concerning testosterone production in elderly men. To further …

It is widely held that variations in the state of secondary sex characters in the male are due to
variations in the amount of hormone produced by the testis, the transformations of puberty …

Abstract Development of prostatic hyperplasia is an almost universal feature of the aging
man and dog, and in both species the process develops only in males with intact testes. As …

That testicular function may be deficient in old men has been recognised from antiquity.
Throughout history there are examples of attempts to rejuvenate Hebrew kings, Popes and …

In an analysis of the role of testicular secretions, it seemed in order first to inquire about the
relation of maleness to sex differences in viability and in pathological conditions occurring in …