Human chorionic gonadotropin (hCG) conversion to mIU/mL, IU/L. Online conversion calculator for many types of measurement units in laboratory and medicine Human chorionic gonadotropin (hCG) ,. 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 . 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.. iu/l: Decimals 1 Decimals 2 Decimals 3 Decimals 4 Decimals 5 Decimals 6 Decimals 7 Decimals 8 Decimals 9 Decimals 10 Decimals 11 Decimals 12 Decimals 13 Decimals No Decimal Human chorionic gonadotropin (HCG) mlU/mL IU/L Conversion in Batch. In Lab test for second pregnancy in 12w+2d sono is normal and NT is 1.6 but papp-a is 20.9 ug/ml and HCG is 30.3 and risk determine intermediate. The doctor recommend self free DNA and Lab recommend repeat test in 15 week. Please help me.