What is the normal value of HCG at 4 weeks of pregnancy?

In clinical practice, hcg belongs to a glycoprotein, belongs to a sex hormone. Often after pregnancy will pay more attention to hcg in various stages of the value. Women in pregnancy four weeks HCG in the blood is about 16-156mIu/ml. With early pregnancy test paper that pregnancy stick urine test, some can be detected, some can not be detected. In addition, Hcg is only an indicator of early detection of embryonic development generally in about 10 weeks will reach its peak, after which it will gradually decline.