The effect of clomiphene citrate on LH release by dispersed rat anterior pituitary cells

Preincubation of pituitary cells for 48 hours with estrogen or clomiphene citrate did not enhance LH release of dispersed pituitary cells after incubation for 4 hours without the secretagogues. In the presence of GnRH, estrogen increased release, but neither the racemic mixture of clomiphene nor its two trans and cis isomers had any appreciable effect on LH release. It is concluded that contrary to published reports, clomiphene in the rat pituitary may behave differently from estrogen in its effects on gonadotrphin release by dispersed cells.