Unit Converter
Human chorionic gonadotropin (hCG)

SI UNITS (recommended)

CONVENTIONAL UNITS

Units of measurement
mIU/mL, IU/L

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 hormonal functions.

Human chorionic gonadotropin consists of a number of isohormones with differing molecular size. The biological action of hCG serves to maintain the corpus luteum during pregnancy. It also influences steroid production. The serum of pregnant women contains mainly intact hCG.

Measurement of the hCG concentration permits the diagnosis of pregnancy just one week after conception. The determination of hCG in the 1st trimester of pregnancy is of particular importance. Elevated values here serve as an indication of chorionic carcinoma, hydatiform mole or multiple pregnancy. Depressed values indicate threatening or missed abortion, ectopic pregnancy, gestosis or intra‐uterine death.

SI units Conversion Calculator. Convert Human chorionic gonadotropin (hCG) level to mIU/mL, IU/L. Clinical laboratory units online conversion from conventional or traditional units to Si units. Table of conversion factors for Human chorionic gonadotropin (hCG) unit conversion to mIU/mL, IU/L.

Last updated: February 17, 2025

Created by: Dr. Rajesh Moganti

Reviewed by : Medical Review Board

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