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 …

The general effects of castration, in addition to the loss of spermatogenesis, have been
known since our earliest historical records. It is not the purpose of this paper to review the …

Testosterone and androstenedione concentrations in the plasma and testis of male guinea-
pigs were estimated by gas chromatography at intervals (36 stages) from birth to death. Four …

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 …

The secretory activity of male accessory organs of reproduction such as the prostate,
seminal vesicle, Cowper's gland and similar organs, differs in many ways from that of other …

The quest of man for sexual rejuvenation dates back to ancient times. In the first century AD
the ingestion of gonads was recommended as an aphrodisiac by Mesue, and for many …

O NE hundred years ago Berthold (1), on the basis of transplantation experiments in the
cock, presented evidence that the testes exert decided effects on the organism through the …

Quantitative measurements of the urinary excretion of gonadotrophins and androgen
metabolites have been correlated with the functional condition of the germinal epithelium in …

T HE testes have two functioning sys-tems, one composed of the interstitial or Leydig cells
with internal secretory activity for the elaboration of male sex hormone, testosterone; 1* 2 the …

The development of the seminal vesicles and their maintenance are known to be
conditioned by the internal secretion or hormone of the testis. Some of the results obtained …