Human Chorionic Gonadotropin or HCG is a popular PCT mostly used by regular steroid users after the end of a cycle. It is basically a substance that imitates the function of LH (Leutenizing Hormone) in the body and controls the release of Testosterone in the body. It is used for normalising the functions of testes after any steroid cycle. And it has a pronounced use in females for treating infertility. The dosage of this substance is normally decided with the consultation of an experienced doctor.