The blood hCG decreases only after a woman has taken mifepristone for 24-72 hours. If patients do not experience vaginal bleeding after taking mifepristone, they should promptly go to the hospital for examination and treatment under the guidance of a doctor. Mifepristone is an oral abortion drug that has certain effects on the female reproductive system and psychology, and is more effective for miscarriage within 4 weeks of pregnancy. hCG Chinese name is human chorionic gonadotropin, and generally the hCG value in normal women is zero, while the hCG value in pregnant women’s body is increasing exponentially. If a pregnant woman takes mifepristone, the hCG value in her serum starts to drop after 24-72 hours, marking the gradual loss of vital signs of the embryo and the start of the drug’s action. Patients need to be careful to take mifepristone on an empty stomach. Before and after taking mifepristone, they should not eat greasy, spicy and cold food, which may affect the effect of the drug and even leave after-effects.