[Should we treat the man or his sperm?].

The treatment of male hypofertility should not be started if spermatogenetic dysfunction is not clearly established. Under 5 millions spermatozoa/ml, it appears that male fertility is generally present. Further fertility investigations should always be continued in the female in such a case. The multiple ways, mainly hormonal in nature, of probable spermatogenetic stimulation and the conditions in which it is wiser to resort to medically associated procreation are analysed.