The HCG in the 9th week of pregnancy is around 100,000 iu/L, which is normal and has reached the peak of HCG level, later the HCG will slightly decrease and stabilize at a higher level. Normally, the diameter of the gestational sac in the 9th week of pregnancy is usually around 3.5 cm and there will be normal fetal heartbeat, which mostly indicates that the embryo is developing normally, and regular maternity checkups will be performed later. During the 11-14 weeks of pregnancy, early Down’s syndrome screening and NT and ultrasound examinations are needed to rule out the risk of chromosomal and congenital diseases in the fetus. 9 weeks of pregnancy is also an early stage of pregnancy, during which the embryo is not yet firmly developed, and it is easy to have lower abdominal pain, vaginal bleeding and other aura miscarriage.