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.. 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.. I am 5 weeks and my beta was 1600 on weds and 2410 on fri. Your numbers should definantly be doubling. I had an ectopic back in June with my beta only being 40 at 4 weeks 2 days. I pray that your . 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 first blood test said I was not pregnant (hcg=0.5) and 7 days later another blood test said I was pregnant (hcg=85). The doc was well and truly puzzled. My dates didn't add up and he didn't like it. Docs don't like anything unusual. They like to be able to tick boxes and pigeon hole you.. The most sensitive, accurate and reliable pregnancy test is a blood test for the presence of beta HCG (human chorionic gonadotropin), often just called beta. The HCG is produced by the embryo, and is the embryo's signal to the mother that pregnancy has occurred. Beta HCG levels vary according to the gestational age. In a non-pregnant woman, they are less than 10 mIU/ml. They are typically .