Volunteers with normal and subnormal semen parameters receive a hormonal male contraceptive in order to investigate whether there are differences between normal and subnormal men in terms of suppressibility, rate of azoospermia and reversibility of suppression of spermatogenesis.
Volunteers with normal and subnormal semen parameters receive a hormonal male contraceptive in order to investigate whether there are differences between normal and subnormal men in terms of suppressibility, rate of azoospermia and reversibility of suppression of spermatogenesis. Twenty-five men will be recruited for each group. They will be exposed to hormonal male contraception for six months.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
41
testosterone injections 4 times
Prof. Dr. Eberhard Nieschlag
Münster, Germany
semen parameters
Time frame: 2005 - 2008
hormones
Time frame: 2005 2008
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