Abstract
The effects of the antispermatogenic compound, ethylene dimethanesulphonate on anterior pituitary and serum FSH, LH and prolactin levels in male rats were investigated. A rapid and sustained rise in serum LH, reaching castrate levels, indictated a normal pituitary response to androgen deprivation. Whilst no change in prolactin was observed, serum FSH showed a biphasic increase which is discussed in relation to the spermatogenic process.