S HCG Non pregnant Female or Male < 4.0 iu/L. Test Usage. 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 . 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 . Hcg level chart by week of Gestational Age post LMP in hCG beta subunit IU/L: 2-3 weeks the HCG level is among 10-70 3-4 weeks the HCG level is among 10-750 4-5 weeks the HCG level is among 200-7000 5-6 weeks the HCG level is among 200-32,000 6-8 weeks the HCG level is among 4,000-150,000 8-12 weeks the HCG level is among 64,000-210,000 14 weeks the HCG level is among 14,000-62,000 15 weeks . Un taux de bêta-HCG qui augmente de façon exponentielle (100 000 UI/L, 200 000 UI/L et plus) peut être signe d'une grossesse molaire (cela reste très rare). La môle est une tumeur bénigne et à potentiel malin qui est un surdéveloppement des cellules placentaires : aucun embryon n'est visible car l'utérus est rempli de ces petites cellules. A savoir qu'une échographie est toujours . Human chorionic gonadotropin (hCG) is a glycoprotein hormone (~37 kDa) composed of two noncovalently linked subunits – the α - and β‑chain (~15 and 22 kDa respectively). The protein is produced by trophoblast tissue and serves to maintain the corpus luteum during the early weeks of pregnancy. In addition, it also influences steroid production.. Similarly to LH, FSH and TSH, human chorionic gonadotropin (hCG) is a member of the glycoprotein family and consists of 2 subunits (α‐ and β‐chains) which are associated to the intact hormone. The α‐chains in all four of these glycoprotein hormones are virtually identical, whereas the β‐chains have greatly differing structures and are responsible for the respective specific .