After a woman is pregnant, HCG will increase rapidly in early pregnancy, and a daily growth rate of about 50% is considered normal. As the level of HCG increase after pregnancy varies among women, there is no comparison value between different individuals, for the same individual, monitoring HCG every other day after pregnancy, as long as it doubles, it is generally normal. The dynamic changes in HCG are of great value in diagnosing and identifying pathological pregnancies and monitoring the development of the fetus in the mother.1. Excessive HCG growth: An abnormally high HCG, even 10-20 times higher than normal, is indicative of pregnancy-related trophoblastic diseases such as chylothorax and choriocarcinoma. Patients need to be diagnosed through ultrasound examination, histopathological examination, etc. and follow medical advice for treatment. 2. Too slow growth of HCG: A small increase in HCG in early pregnancy, or even a decreasing trend, or accompanied by abnormal symptoms such as lower abdominal pain, back pain, vaginal bleeding, etc., requires timely examination, suggesting possible ectopic pregnancy, embryonic abortion, spontaneous miscarriage, pre-eclampsia, etc. However, if a pregnant woman only has a slow growth of HCG and no other abnormal symptoms, she should follow the doctor’s instruction to regularly monitor the HCG value and the development of the fetus, and take fetal preservation treatment if necessary.