Fetal heart may be seen on 27 days of transfer, but it is not absolute, some women may have to delay a few days before they can see the fetal heart. Doing blastocyst transfer when the embryo development is relatively fast, the transfer of 26 days may see the development of the fetal heart, the embryo transfer development is relatively slow, the transfer of 26 days may not see the fetal heart for the time being, but through the urine pregnancy test, blood test HCG (human chorionic gonadotropin) can be sure that the pregnancy. The success rate of transplantation is not 100%. If you cannot see the development of the fetal heart after transplantation, you should consider that the transplantation has failed, and you cannot continue the pregnancy if it is not a normal live fetus. Can not see the fetal heart after 26 days of transplantation can be observed first, and then go back to the hospital one week later to review, to determine that there is a fetal heart can continue to be pregnant, there has not been the emergence of the fetal heart, we must promptly do the termination of pregnancy treatment. After the IVF transplantation, you should do a good job of pregnancy checkups, in order to be able to find the problem of timely treatment.