PREGNYL
PREGNYL is an injectable, highly purified preparation of human chorionic gonadotropin that mimics the normal surge of luteinizing hormone (LH) that occurs mid-way through a normal menstrual cycle and causes ovulation to begin.
Istimulating the testes to produce testosterone even when natural LH is not present or is deficient. It therefore is useful for maintaining testosterone production and/or testicle size during a steroid cycle.Use of this drug in the taper is rather counterproductive, since the resulting increased testosterone production is itself inhibitory to the hypothalamus and pituitary, delaying recovery. Thus, if this drug is used, it is preferably used during the cycle itself. A daily amount of 500 IU is generally sufficient, and in my opinion usage should not exceed 1000 IU per day.
Human Chorionic Gonadotropin, HCG, is also widely used in athletics today. HCG is not a natural male hormone but mimics the natural hormone LH (Luetinising Hormone) almost identically. LH stimulates the production of testosterone by the testis in males. Thus HCG sends the same message which results in increased testosterone production by the testis due to the effect of HCG on the leydig cells of the testis. Athletes use HCG to increase the body’s own natural production of testosterone which is often depressed by long term steroid use.