HCG is the same hormone found in Urine when a female is pregnant. Put a drop in a pregnancy test and if it comes up positive, voila, you have real HCG.
"Human chorionic gonadotropin, is a hormone made by the pregnancy that can be detected in the mother's blood or urine even before the woman's missed period. This hormone is what we look for with a "pregnancy test." HCG, which is secreted by the trophoblast after the ovum is fertilized, appears in the blood and urine of pregnant women as early as 10 days after conception, which is one to two days after implantation."