i took a preganancy test after 3 days of taking ECP the result was less than 5.0 HCG level(-ve) than had early periods ,now its almost a month and am not having my periods and took a blood pregagnancy test and the result is HCG 5.2 miu/ml .. Human chorionic gonadotropin (hCG) is a glycoprotein secreted by the placenta during pregnancy that consists of an alpha and beta subunit. The alpha subunit is structurally similar to the alpha subunits of FSH, LH and TSH. The beta subunit is distinct for hCG. The release of hCG into maternal circulation begins with embryo implantation 5 to 7 days after fertilization.. Human Chorionic Gonadotropin which is commonly known as hCG is an important hormone especially during early pregnancy. It is manufactured and secreted by the cells which eventually end up as the placenta.. My beta hcg level was 0.1mIU/ml when i got it checked 15days ago and now it is 0.5mIU/ml. I have missed my period. I am also having food aversion, regular burrping without acidity, back ache.. If so the 5 could be hcg from the shot and not the beginning of a pg. If it goes up that is a positive sign for pg. Most labs will tell you negative on beta if under 20 or 25. If next beta is a 10 or higher is a very good sign :) For the first day or 2 of pg, 5 is not a bad #.. The hormone human chorionic gonadotropin (better known as hCG) is produced during pregnancy. It is made by cells formed in the placenta, which nourishes the egg after it has been fertilized and becomes attached to the uterine wall..