An acidic glycoprotein hormone of the anterior pituitary that stimulates the graafian follicles of the ovary and assists subsequently in follicular maturation and the secretion of oestradiol; in the male, it stimulates the epithelium of the seminiferous tubules and is partially responsible for inducing spermatogenesis.

Synonyms: follicle-stimulating hormone, follicle-stimulating principle, gametokinetic hormone.

Origin: follicle + G. Trope, a turning, + -in

(05 Mar 2000)