Answer
The hypothalamus secretes gonadotropin releasing factors (GnRH) which are transported to the anterior pituitary by way of the hypothalamo-hypophyseal portal system. The GnRHs stimulate the secretion and release of gonadotropins(GTHs) -- follicle stimulating hormone (FSH) and luteotropic/luteinizing hormone (LH). Leptin regulates the the secretion of GnRH, increases the sensitivity of the anterior pituitary to GnRHs and controls the synthesis of steroid hormones by ovary and corpus luteum(CL).
Work Step by Step
The effect of LH is to stimulate the interstitial cells of Leydig to produce testosterone. Follicle stimulating hormone acts on the sustentacular ( Sertoli) cell to induce the secretion of ABG, an androgen binding globulin, which binds testosterone and accumulates it in the seminiferous tubules and epididymis. Without FSH and ABG, testosterone is unable to affect the testes . Germ cells are without testosterone receptors, and are incapable of responding to it by themselves
Effects of accumulation of ABG and testerone:
Onset and increase in sperm production
Brain stimulation and onset of libido
Skin dargens
Body odor develops
Muscle mass and strength increase
Axillary, pubic, and facial hair grow
Erections increase in frequency
Ejaculations may occur in sleep
