Male hormonal contraceptive regimens function by suppressing gonadotropin secretion,
resulting in a dramatic decrease in testicular androgen biosynthesis and spermatogenesis …

In normal men, chronic testosterone (T) administration results in negative feedback
suppression of gonadotropin and sperm production. However, azoospermia is achieved in …

Conversion of testosterone to dihydrotestosterone (DHT) by the action of 5α‐reductase can
amplify androgen action. This may be of particular importance in the presence of low …

The effect of a novel combination of oral etonogestrel (ENG) and im testosterone decanoate
(TD) on suppression of gonadotropins and spermatogenesis as a potential lead for male …

The principle of hormonal male contraception based on suppression of gonadotropins and
spermatogenesis has been established over the last three decades. All hormonal male …

Context: Male hormonal contraceptive methods require effective suppression of sperm
output. Objective: The objective of the study was to define the covariables that influence the …

GnRH antagonists plus testosterone (T) suppress LH and FSH levels and inhibit
spermatogenesis to azoospermia or severe oligozoospermia. High-dose T treatment alone …

In this study we compared the effects of high‐dose and low‐dose testosterone enanthate
(TE) administered with the same dose of cyproterone acetate (CPA). Eighteen men aged 21 …

This is a pilot dose-finding study of spermatogenic suppression using testosterone
undecanoate (TU) injections alone in normal Chinese men. Thirty-two healthy men were …

Testosterone-based hormone combinations are able to reversibly suppress human
spermatogenesis; however, a uniformly effective regimen has remained elusive …