When is the hCG titer in the blood considered to be too low and when is it considered to be slow rising?
Calculate your hCG levels with the BabyMed hCG Calculator.
An hCG level below 5 mIU/ml is considered "not pregnant"
An hCG level above 25 mIU/ml is considered "pregnant".
An hCG level between 5-25 mIU/ml requires a follow-up test to confirm what it could be.
At hCG levels in early pregnancy below 1,200 mIU/ml the hCG usually doubles every 48-72 hours and it should normally increase by at least 60% every two days.
Between 1,200 and 6,000 mIU/ml serum hCG levels in early pregnancy, the hCG usually takes 72-96 hours to double
Above 6,000 mIU/ml, the hCG often takes over four or more days to double.
After 9-10 weeks of the pregnancy hCG levels normally decrease
There are several possibilities when a Beta hCG level rises slower than expected.
Testing at the same lab and in multiples of two days apart allows us to more easily interpret the levels and eliminates the possibility of variation between labs. Now that BhCG testing is standardized, this has become less of an issue.
Many doctors use hCG values as only a reference. Depending on the estimated gestational age, other testing such as transvaginal or abdominal ultrasound is also used to determine pregnancy progress.