To start off, hCG, stands for Human chorionic gonadotropin. It is a pregnancy hormone approved from the U.S Food and Drug Administration to treat infertility in both men and women.
This diet craze started in the 1950s, when Dr. A. Simeons introduced the use of hCG injections combined with a strict 500-calorie-a-day, high-protein diet to treat infertility. It should be noted that people with excess weight may be less fertile than healthy weight individuals. For these overweight or obese individuals simply losing weight will increase their fertility and increase their chances of pregnancy.