Although basal serum LH and FSH levels have been shown to increase with age in men,
there is evidence that aging may impair pituitary gonadotropin secretion to some extent. We …

Although alterations of circulating sex steroids have been reported in aging men, it is not
known to what extent reported changes may represent effects of variables other than aging …

Age-related changes of serum gonadotropin levels in normal men were studied using a
specific double-antibody radioimmunoassay of luteinizing hormone (LH) and follicle …

The influence of aging on episodic LH secretion and the release of LH and FSH after LRH
administration was studied in 14 healthy men, aged 65–80 yr. Mean morning serum …

The effects of dose and of age on the serum LH and FSH responses to synthetic
gonadotropin-releasing hormone (GnRH) were determined in normal men. GnRH was given …

The influence of aging on the responsiveness to sex steroid hormones in men was studied
by comparing circulating gonadotropin concentrations, pulsatile LH release, and sex …

Decreased testicular function occurs as a concomitant of aging in men and is accentuated
by the presence of systemic illness. Previous studies identified an intrinsic Leydig cell defect …

The influence of aging on serum levels of gonadotropins (FSH and LH), testosterone and
estradiol was studied in the following groups: 4 normal men (ages 30 to 50), 38 men with …

To examine the biological quality and physiologically pulsatile mode of endogenous
luteinizing hormone release in active, healthy aging men, we used the rat interstitial-cell …

The mechanisms that most likely underly the attenuated response of plasma LH to
antiopioids or antiestrogens and the reduced frequency of large amplitude LH pulses in …