HCG is human chorionic gonadotropin, which is secreted by the placenta. The value of blood HCG will rise rapidly after pregnancy, and the specific growth values are as follows: 1.HCG is 5-50mIU/m1 at 0.2-1 week of pregnancy, at this time of examination, pregnancy can be suspected; 2.HCG is 50-500mIU/m1 at 1-2 weeks of pregnancy, when the blood HCG level exceeds 50 mIU/m1, pregnancy can be confirmed; 3.HCG is 100-5000mIU/m1 at 2-3 weeks of pregnancy When the blood HCG level exceeds 50 mIU/m1, the diagnosis of pregnancy can be confirmed; 3. 100-5000mIU/m1 at 2-3 weeks of pregnancy; 4. 500-10000mIU/m1 at 3-4 weeks of pregnancy, and the HCG value can double every other day at about 4 weeks of pregnancy, which is an important indicator to determine whether the pregnancy is normal; 5. 1000-50,000mIU/m1 at 4-5 weeks of pregnancy; 6. 10,000-100,000mIU/m1 at 5-6 weeks of pregnancy -The HCG value can reach the peak in the 8th week of pregnancy; 8. The HCG value can reach 10,000-100,000 mIU/m1 in the 8-12 weeks of pregnancy, and from the 8th week of pregnancy, the HCG value starts to decrease to a medium level until the 16th week of pregnancy, after which the HCG value can be maintained at a medium level. If the HCG level increases slowly or even starts to decrease gradually during pregnancy, it is possible that the embryo is underdeveloped, pre-term abortion or stillbirth. If the HCG value rises too fast and is greater than 100000mIU/ml or more, you should pay attention to whether you are suffering from diseases such as staphyloma or chorioepithelial carcinoma, and should go to the hospital for examination and treatment in time. In addition, pregnant women can take folic acid tablets orally in early pregnancy and have regular pregnancy checkups.