Growth hormone in sports which the anterior pituitary gland produces excess growth hormone. Human growth hormone occurs naturally in the human body. Use of exogenous human growth hormone (HGH), via injection, was originally for medical purposes until athletes began abusing HGH with the goal of increasing their abilities. Before recombinant human growth hormone (rHGH) was developed in 1981, HGH was only available from cadavers. The arrival of rHGH combined with other peptide hormone advancements has increased the availability of HGH on both the legitimate and black markets. The first description of the use of GM as a doping agent was Dan Duchaine’s “Underground Steroid
The Sexual Brain performance, control of body temperature, stress, emotional responses, growth, and many other functions". LeVay notes that his INAH 3 study was his only publication on sex to that date, and that most of his previous research had been on the visual areas of the cerebral cortex. LeVay compares homosexuality to the disease sickle cell anemia, arguing that it may have persisted through a similar genetic mechanism. "The Sexual Brain" was first published in 1993 by MIT Press. "The Sexual Brain" received positive reviews from the journalist Peter Gorner in the "Chicago Tribune", Kenneth McLeish in "The Independent", the psychiatrist Avodah