iu/L. Reference Range. 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 . Newborn serum beta-hCG concentrations are approximately 1/400th of the corresponding maternal serum concentrations, resulting in neonate beta-hCG levels of 10-50 IU/L at birth. Clearance half-life is approximately 2-3 days. Therefore, by 3 months of age, levels comparable to adults should be reached.. 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 . The hcg level chart for twins and molar pregnancy hcg level chart If the woman has a singleton baby the above chart will be a good indicator on the pregnancy age. To calculate beta hcg level chart for twins (multiples chart) and molar pregnancy by DPO in mIU/L of hCG beta-subunit level:. Human chorionic gonadotropin (hCG) is a glycoprotein 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 (HCG) Unit Conversion between mlU/mL and IU/L.