blood follicle stimulating hormone amount blood follicle stimulating hormone level Trait.ontology serum levels of follicle stimulating hormone serum levels of follitropin The proportion, quantity, or volume in whole blood, serum, or plasma of the hormone that, in females, stimulates the Graafian follicles of the ovary and assists in follicular maturation and the secretion of estradiol; in the male it stimulates the epithelium of the seminiferous tubules and is partly responsible for spermatogenesis. serum levels of gametokinetic hormone EFO:0004768 VT:0002790 circulating follicle stimulating hormone level serum levels of FSH blood gonadotropin amount blood pituitary hormone amount