As a rule most people do hcg during a cycle.
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Taken from the wiki
Weight loss
A controversial usage of hCG is as an adjunct to the British endocrinologist A.T.W. Simeons' ultra-low-calorie weight-loss diet.[7] Simeons, while studying pregnant women in India on a calorie-deficient diet, and “fat boys” with pituitary problems treated with low-dose hCG, discovered that both lost fat rather than lean (muscle) tissue. He reasoned that hCG must be programming the hypothalamus to do this in the former cases in order to protect the developing fetus by promoting mobilization and consumption of abnormal, excessive adipose deposits. Simeons, practicing at Salvator Mundi International Hospital in Rome, Italy, clinic mainly for celebrities, recommended low-dose daily hCG injections (125 mg) in combination with a customized ultra-low-calorie (500 cal/day, high-protein, low-carbohydrate/fat) diet loss of adipose tissue without loss of lean tissue. After Simeons’ mysterious death, the diet started to spread to specialized centers and via popularization by such as the controversial author Kevin Trudeau.
The controversy proceeds from warnings by the Journal of the American Medical Association[8] and the American Journal of Clinical Nutrition[9] that hCG is neither safe,[8] nor effective as a weight-loss aid.[10]
In the world of performance enhancing drugs, hCG is increasingly used in combination with various anabolic androgenic steroid (AAS) cycles. As a result, hCG is included in some sports' illegal drug lists.
When AAS are put into a male body, the body's natural negative-feedback loops cause the body to shut down its own production of testosterone via shutdown of the hypothalamic-pituitary-gonadal axis (HPGA). This causes testicular atrophy, among other things. hCG is commonly used during and after steroid cycles to maintain and restore testicular size as well as normal testosterone production.
High levels of AASs that mimic the body's natural testosterone trigger, the hypothalamus, to shut down its production of gonadotropin-releasing hormone (GnRH) from the hypothalamus. Without GnRH, the pituitary gland stops releasing luteinizing hormone (LH). LH normally travels from the pituitary via the blood stream to the testes, where it triggers the production and release of testosterone. Without LH, the testes shut down their production of testosterone. In males, hCG helps restore and maintain testosterone production in the testes by mimicking LH and triggering the production and release of testosterone.
If hCG is used for too long and in too high a dose, the resulting rise in natural testosterone will eventually inhibit its own production via negative feedback on the hypothalamus and pituitary.
