1. Gonadotrophin Releasing Hormone (GnRH): Secreted from the hypothalamus of the brain. FSH, LH, testosterone hormones regulate sperm production.
2. Follicle Stimulating Hormone (FSH): Produced by the anterior pituitary gland. Stimulates spermatozoa by stimulating the seminiferous tubules of the testicles.
3. Testosterone (Testosterone): Produced from the testes. Develops male sexual characteristics and stimulates the testicles. Mineral salts help in digestion.
4. Luteinizing Hormone (LH): Produced by the anterior pituitary gland. Testosterone stimulates the interstitial cells of the testicles to secrete the hormone.
5. Gonadocorticoid Hormone: Produced by the adrenal gland. Regulates embryonic sex differentiation. Develops sexual organs, gonads and secondary sexual characteristics.
6. Inhibin: Produced by Sertoli cells of the testes. Decreases GnRH and FSH hormone secretion.
7. Androsterone: Produced by the testes. Develops male sexual characteristics and stimulates the testicles. Mineral salts help in digestion.
8. LTH: Produced by the pituitary gland. Develops secondary genitalia.