THORAX ABDOMEN AND PELVIS

Detailed explanation-1: -Fetal and adult periods of testosterone production. Fetal Leydig cells produce the high levels of testosterone that are required for the differentiation of the male genitalia and for brain masculinization.

Detailed explanation-2: -It is secreted by the interstitial cells of Leydig in the testes and by the adrenal glands in both males and females.

Detailed explanation-3: -Leydig cells produce testosterone in the testes under the pulsatile control of pituitary luteinizing hormone (LH). cAMP is the intracellular messenger for LH action on steroidogenesis, and pharmacological evidence indicates that the response to LH can be modulated by cyclic nucleotide phosphodiesterases (PDEs).

Detailed explanation-4: -Testosterone and other androgens are made by Leydig cells. The germ cells are fed by the Sertoli cells. They create a variety of proteins, including enzymes, hormones, androgen binding proteins, and inhibin. Sertoli cells do not produce testosterone.