The value of blood human chorionic gonadotropin after blastocyst transfer varies from person to person, generally 80mmol/L at 12 days is likely to be normal, but dynamic observation is needed. Blood human chorionic gonadotropin 80mmol/L at 12 days after blastocyst transfer may be normal. Generally speaking, two or three days after blastocyst transfer, the blastocysts will be planted in the endometrium, and the value usually ranges from about 50-500 in 1-2 weeks after embryo transfer. If the blood human chorionic gonadotropin test is only 80mmol/L at this time, it is necessary to dynamically review, if it doubles in 48 hours, it may be normal, if the rise is not satisfactory, it may be due to the occurrence of embryonic arrest, preterm miscarriage and so on. Therefore, the blood human chorionic gonadotropin 80mmol/L on the 12th day of blastocyst implantation may be normal, and it is recommended that pregnant women should undergo regular checkups according to their own conditions, and deal with any abnormalities at any time.