Prolactin gonadotrophins in 208 men presenting with infertility.

Prolactin, FSH and LH were measured in the plasma of 208 male partners of infertile marriages. We found 1 case of marked hyperprolactinaemia in 82 oligozoospermic men (1.2%). There was no difference in the mean prolactin levels of men with normal sperm counts and men with oligozoospermia or azoospermia. One-third of the men with azoospermia and with sperm density of less than 10 million had marked FSH elevation and our experience confirms the work of others that this indicates a poor prognosis.