Embryo transfer is one of the more widely used assisted reproduction techniques, and the success rate of embryo transfer is now higher and higher, but there are still many patients who are unsuccessful in the process of embryo transfer. If it is not successful mainly the following manifestations: First, the chorionic gonadotropin in the pregnant woman’s body does not rise significantly after the transfer, and even if it does, the rise is small and there is no doubling of HCG, which has a great relationship with embryo viability. Secondly, pregnancy test cannot be detected. If you are indeed pregnant, you can check it by laboratory test about 10 days after the transfer. Third, not seeing anything in the uterine cavity by ultrasound is also a sign of transplant failure. Fourth, there is no reaction similar to early pregnancy.