It is possible that there is still hope when HCG (Human Chorionic Gonadotropin) is not elevated on the 7th or 8th day of frozen embryo transfer. Although the time of embryo transfer is the same, the time of embryo’s implantation may be different, if its implantation time is 1~3 days later, the result of blood sampling may show different, so some patients have blood sampling on the 7th~10th day of blood HCG shows elevated, but some embryos may just implant on the 7th or 8th day, and blood sampling for HCG has not been found to be elevated, and it may be normal, and it can be rechecked in a week. At the same time, you need to pay attention to rest after the implantation, maintain a good state of mind, do not overstress, pay attention to relaxation, and continue to do a good job in the review can be, there is still hope. The specific situation, need to be decided by the doctor’s consultation, if there are uncomfortable symptoms, go to the obstetrics and gynecology department in a timely manner.