Several, more or less successful, medical treatments have been propose
d for idiopathic male infertility. We assessed the effect of high-dose
FSH (150 IU) in patients with idiopathic oligospermia in comparison w
ith patients given low doses. In the high-dose group, there was a sign
ificant rise in spermatozoid concentration (p < 0.0001), mobility (p <
0.0001) and morphology (p < 0.007).