hcg refers to chorionic gonadotropin, the blood level is less than 5mIU/ml when not pregnant, after pregnancy if the embryo develops well it will double and grow in proportion to the number of weeks of pregnancy, it is very accurate to determine the week of pregnancy by the level of hcg in the blood, you can check hcg in early pregnancy, according to the number of days of pregnancy and hcg comparison table, you can more accurately determine the number of days of pregnancy. The growth rate of hcg in the serum in early pregnancy is very fast, doubling in about 1.7-2 days, reaching a peak in serum concentration in 8-10 weeks of pregnancy, continuing until 12 weeks of pregnancy when it drops rapidly, and then remaining at a certain level. Because of this pattern, it has an important clinical value, and the hcg test can determine whether the pregnancy and the number of days of pregnancy and the development of the fetus. Specific comparison is as follows: 3-4 weeks of pregnancy: 9-130mIU/ml; 4-5 weeks of pregnancy: 75-2600mIU/ml; 5-6 weeks of pregnancy: 850-208003mIU/ml; 6-7 weeks of pregnancy: 4000-100200mIU/ml; 7-12 weeks of pregnancy: 11500-289000mIU/ml; 12-16 weeks of pregnancy. 18300-137000mIU/ml; 16-29 weeks of pregnancy: 1400-53000mIU/ml; 29-41 weeks of pregnancy: 940-60000mIU/ml. The value of hcg can be used to measure the luteal function of pregnant women and determine whether the fetal development is normal. The level of hcg content has a certain relationship with the time of pregnancy, pregnant women can pay attention to the number of days of pregnancy and The hcg level is related to the duration of pregnancy, and pregnant women can pay attention to the number of days of pregnancy and the hcg control table, and seek medical attention in time when deviations occur. Of course, each hospital testing method is different, the standard may be slightly different, or the local hospital is the main.