Ok, but here is info I got from edition 9. "If used for too ; long or at too high a dose, the drug may actually function to desensitize the Leydig's cells to luteinizing hormone, further hindering a return to homeostasis.
Bodybuilders and athletes may also administer Human Chorionic Gonadotropin throughout a steroid cycle, in an effort to avoid testicular atrophy and the resulting reduced ability to respond to LH stimulus. In effect, this practice is used to avoid the problem of testicular atrophy, instead of trying to correct it later on when the cycle is over. It is important to remember that the dosage needs to be carefully monitored with this type of use, as high levels of hCG may cause increased testicular aromatase expression (raising estrogen levels),920 and also desensitize the testes to LH.921 As such, the drug may actually induce primary hypogonadism when misused, greatly prolonging, not improving, the recovery window. Current protocols for the use of hCG in this manner involve administering 250lU subcutaneously twice per week (every 3rd or 4th day) throughout the length of the steroid cycle. Higher doses may be necessary for some individuals, but at no point should exceed 500lU per injection.