In male contraceptive trials, approximately half of normal men become azoospermic on high
dosages of testosterone enanthate (TE), whereas the other half of men become severely …

Hormonal suppression of spermatogenesis is currently being investigated as a method of
reversible male contraception. However, administration of exogenous testosterone (T) …

Sex-steroid based male contraceptive regimes induce azoospermia in only 40-70% of
Caucasian men. The reason (s) why the remainder maintains a low level of …

Objective: To determine the functional capacity of residual spermatozoa in semen samples
from normal men with T enanthate-induced oligozoospermia. Design: Prospective clinical …

Weekly intramuscular administration of testosterone esters such as testosterone enanthate
(TE) suppresses gonadotropins and spermatogenesis and has been studied as a male …

Studies using high dose testosterone (T) administration in normal men as a male
contraceptive have resulted in azoospermia rates of only 50-70%. Previous studies of T and …

Sixteen healthy adult male volunteers were studied to determine whether it would be
possible to maintain azoospermia with testosterone enanthate (TE) administered at a dose …

Monthly injections of testosterone undecanoate (TU) act as a male contraceptive by
reversibly suppressing spermatogenesis to azoospermia or severe oligoazoospermia in …

Hormonal male contraception based on testosterone alone or on a combination of
testosterone with a gestagen has been shown to suppress spermatogenesis effectively and …

BACKGROUND: Effective hormonal male contraception requires a high prevalence of
spermatogenic suppression, which has proved particularly difficult in Caucasian …