Inhibit lh secretion through action on anterior pituitary. Differentiation and function of male accessory reproductive organs. 17. 9 puberty: characterized by increased secretion of adrenal androgens, under atch stimulation. Increased amplitude and pulse frequency of gnrh release, leading to increased secretion of pituitary gonadotropins: androgens are anabolic steroids --stimulate protein synthesis in muscles and erythropoietin secretion (why males have higher hematocrit) Important in sex drive and sexual behavior in males: brain less sensitive to negative feedback controls during puberty. Anabolic steroid use: abuse of synthetic androgens increase muscle mass and athletic performance, but has negative feedback effect on lh --decrease in testosterone and fsh secretions, reduced spermatogenesis and decreased testicular size (infertile) 17. 11 andropause: andropause: increased emotional problems arising with changes to the male reproductive system as a result of aging, steady decrease in testosterone production starting around 40yo, decreased testicular function, reduced libido.