B-HCG is actually not called B-HCG, but β-HCG, which is just a type of HCG, because HCG is also the human chorionic gonadotropin in the body, there are two main types: one is α-HCG, and another is β-HCG, strictly speaking, β-HCG is the specificity of HCG, which is the standard for determining whether there is pregnancy. HCG and β-HCG have a certain conversion relationship, the HCG in the body is four times the β-HCG, because some hospitals may have higher accuracy of the machine, can be tested for β-HCG, can be calculated according to the conversion relationship in the body We can calculate the level of human chorionic gonadotropin in the body according to the conversion relationship.