Hi, I just need to know that what should be the beta hcg levels in the bosy after having normal periods? Should it be zero or it can be anywhere less then 2 or 5?. Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Acharya on beta hcg level of 2: Molar transformation can do the same also. Talk to PMD. Doctors give trusted answers on uses, effects, side-effects, and cautions: Dr. Acharya on beta hcg level of 2: Molar transformation can do the same also. Talk to PMD. . 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 testing the urine, i. e, by using urine pregnancy test . Beta-hCG levels decrease rapidly in the first 1-2 weeks after delivery, termination or complete miscarriage and then the rate of decrease slows down beyond 2 weeks. At 6 weeks levels should be zero. At 6 weeks levels should be zero.. No. You are considered not pregnant if your HCG level is 5 or below. 5 to 50 is possible but sort of dangerous and worth watchingand above 50 is a.. But, it is perfectly NORMAL to have a 'Background' level of 0.1 to 1.2 - And, it is absolutely IMPOSSIBLE to have any HCG in your body from any PREGNANCY at 4 to 5 days after ANY sex, EVEN if you were really pregnant - and so this 0.1 IS NOT from a pregnancy - that would be impossible..