In early pregnancy, even if the blood HCG exceeds 10,000 mIU/mL, it will still double every other day, which is the pattern of doubling of blood HCG in intrauterine pregnancy in early pregnancy. When the pregnancy enters the tenth week of pregnancy, the growth rate of blood HCG will slow down and it may not double every other day, which is normal in clinical practice. Ultrasound examination is recommended to clinically understand the growth and development of the embryo. However, in case of vaginal bleeding or lower abdominal pain, it is recommended to pay clinical attention. If it is confirmed by ultrasound that the embryo is developing well in the uterus and the blood HCG rises after the tenth week of pregnancy, bed rest and fetal stabilization treatment are recommended.