LH is secreted by adenohypophysis or anterior pituitary gland. FSH is the other hormone (gonadotropin).
Functions of LH:
(a) In males, it stimulates spermatogenesis.
(b) It stimulates Leydig's cells to produce testosterone.
(c) In females, it stimulates ovulation and formation of the corpus luteum.
Functions of FSH : In females, it stimulates the growth of ovarian follicles.
ICSH, in males stimulates the secretion of testosterone hormone.