The test identifies the amount of hCG in the mother's blood, expressed as an amount by milli-international units of hCG hormone per milliliter of blood (mIU/ml). How Physicians Interpret hCG Results . It is important to note that any single hCG test in early pregnancy does not tell much about the health of a pregnancy or fetus because individual women have a wide variation in hCG levels, and . It can be measured by blood or urine tests, although the former are more sensitive than the latter. Concentrations of hCG are commonly reported using thousandth international units per milliliter (mIU/ml). Human chorionic gonadotropin tests. Although it is commonly known as beta hCG, this hormone has two subunits: α-subunit (alpha). The hCG urine test is normally used as a routine pregnancy test, and it doesn’t measure exactly the total quantity of hCG. It just shows thepresence or absence of hCG. There are home pregnancy tests which can be used to show the presence of hCG in urine and are widely available. 2. Understand the Results of Your Beta hCG Levels Tests. Beta HCG levels can be measured in the blood by RIA (radioimmunoassay) , CLIA (chemiluminescent assay) and DELFIA ( fluorescent immunoassay) testing; and positive levels (more than 10 mIU/ml) in the blood can be detected as early as 2 days before the period is missed. In the old days, the only way of determining the presence of HCG was by . (mIU/mL to IU/L, the conversion factor is 1) HCG level in pregnancy: HCG is detectable after 6 to 8 days of the delivery when the level is around 10 to 50 mIU/mL. The HCG doubles every two days until the concentration is 1200 mIU/mL around 10 weeks. Then double every three days between 1200 to 6000.. So, it may take two days for hCG levels to exceed 2 in a woman with an hCG level less than 2 who becomes pregnant. Potential. An hCG level of 2 can multiply exponentially to 165,400 mIU/ml by the 24th week of pregnancy, per the APA’s hCG guideline chart. For a woman who has recently miscarried, an hCG level of 2 means that the pregnancy has .