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, they are less than 10 mIU/ml. They are typically . I've been thinking of you, MaryM, and crossing everything for you! Hang in there! The progesterone injections are quite literally a pain in the , but they're worth it!. Two consecutive quantitative hCG beta blood tests can determine whether the hCG is from an injection or pregnancy. If the hCG level increases by the second test, you are likely pregnant. If the hCG level increases by the second test, you are likely pregnant.. I have got my letter back from the hospital and my calculated risk and it is 1:60. I am trying to find out what the normal levels for free beta HCG and PAPP-A are, but cannot seem to find out.. . .